You have a lot of questions - and there should be one question on StackOverflow that you can answer without creating a lot of debate or sticking to opinions, not facts.
As such, I think your question may be closed as "too broad"; however, I think he deserves an answer.
I'm not going to say "it depends", although in fact it all comes down to - but here is my attempt to explain it.
nodejs is a runtime. This is an environment that allows you to develop code on the server using javascript. To do something useful with nodejs besides "hello world"; you will need to use the framework, and there are many who are around, and various groups have been developed by the community to link all the components together. An example of such a stack is MEAN, which is MongoDB for the database, Express for the framework, Angular to help with the interface, and Node to run it all.
django is a structure - this is not runtime. This means that one step removed from the world of Node. Runtime for django is Python. django is also not a "stack" like MEAN, you can develop your own stack on top of it, but since django is an "included battery", you really need to add a database - it includes everything else that you need.
REST is just a way to develop web services. It is not a language, not a platform or library. Its a set of rules describing how APIs are designed to use HTTP semantic verbs.
You can use any library and programming language to develop a RESTful service. All you really need are two things: [a] a library for communicating via HTTP [b] a way to serialize data, preferably in JSON (but even this is not a requirement).
nginx is a very fast web server and reverse proxy. The reason he is often mentioned is because it is very expensive for a frame structure for static media. All requests to the structure (either in the django world or in the nodejs world) must go through a large chain of components that help decode the HTTP request and create a data structure that is easy for developers to use. This component chain is often called middleware. Since each request must go through this middleware, it is better, for performance reasons, requests that do not require the "power" of the application to be executed (for example, an image request, style sheet, video file) are handled by something else. Nginx is used for this, as its very fast web server.
Now that everything is explained, you need to see which stack is best for your application. To do this, you need to learn a little about the philosophy / rationale or problem that each stack is trying to solve.
For django - it's easy. Django was created by a team working in several newspapers to help them manage content published on different sites. Thus, it is designed so that content management is a priority. This is why it has a very reliable administration console as a standard component; and built-in pretty robust ORM and its own template engine. Django leaves this for you to figure out how best to run and deploy it; although they provide many suggestions and examples, in the end it’s up to you to decide which database to use, which web server to use and how to deploy the application.
In the world of nodejs, the focus is on non-blocking I / O and response speed. Nodejs stands out for being able to serve many concurrent requests for limited resources. Therefore, it provides you with a very powerful foundation for developing applications that need to respond quickly to requests ... and what it is. When you program in Node or any other specialized lower-level library, you need to make sure that your code makes full use of the library. So, if you start writing blocking code in node, you will find that the expected performance has not been achieved.
nodejs does not care what the application really does. Think of it as a very fast, very powerful tool. You can create something with it, but you need to know that the tool is designed to achieve the best results, in order to know when to use it.
nodejs works at a lower level - this is why there are many packages that can help you do all kinds of things with node; and several ways you can take components and create your own stack - depending on what you build on top of node. Think of it as building blocks of Lego.
nodejs and django are not mutually exclusive. You can use both in your application and use your strengths and use what everyone does best.
Regarding your specific questions:
Did I get an image? Any comments?
I dont know. You?
Are there any additional components that will be needed? To start?
The answer to this question is yes, because you do not want to build everything from scratch. Each stack has its own library components for developing services. For django there is a django rest framework (DRF).
Which structure is best for CRUD? Which structure is best for RESTful? Any other module required? Best report generator for printing? Best chart tools?
Nothing is “best” for everything. This question just requires an opinion. Its like asking what is the best fruit juice?
Which structure is the fastest and most reliable for CRUD using Postgresql
People have developed many reliable applications on top of postgresql; however, since nodejs is tied to javascript - there is still a lot of work in this area.
Is it possible to block the library (trade secrets) in both environments?
Yes.
Are there any better tools for creating ERP / Accounting?
ERP and accounting are two different things. Python has many accounting packages / applications. Python has very few ERP systems.
You cannot combine the two and combine them.
What are the benefits of using Angular on top of node.js?
The same benefit of using Angular over _____ (insert your favorite backend). Angular is just the foreground library.
An unusual advantage is that both Angular and Node use the same programming language.