What to learn to create a dictionary and learning site?

Question

Programming

Hi all. I know JS, now I will learn node.js.
I want to create a service website that will include:

• Russian-Chinese-English dictionary, there will be complex relationships within the database
  
• interactive learning Chinese lessons in Russian and English
  
• various services such as a Chinese sentence validator, creating PDF copybooks, searching for counting words and other useful features for Chinese learners
  
• 2 website translation languages ​​- Russian and English
  

A little later, I want to make another social network for Chinese learners with a rating of those who answer questions.
The question is. Apart from learning more about node.js, what things should I look out for and learn next?
Is it possible to write on pure node.js or do I need to know some kind of framework? If so, which one?
If you write in pure node.js, then what measures should be taken to protect the database, and so on.
What to do in general?))

Answer 1

What to do in general?))

As always - to predict and optimize EVERYTHING that is possible before the start of (training and) the work itself.
Risks, threats, labor costs, payback - all this is for yourself and for your project.
Simply put: You understand: WHY do you want to do this?