Advice and Information on reading Books.

Hello everyone, I am new to Reading world.. previously I was consuming social media like a fool..I wanted to start reading early but could not do it finally I am starting my journey.. I have read three novels.. To me I was just trying to read classic and trying to develop the habit of reading.. I read them and could not really draw insights cause I don't know anything so I am asking you guys to help me this regard..

I am partial towards Knowledge based books and may be philosophical books.. but I am also interested in Science fiction and Classic novels.. so I have few questions to ask and also accepting advice from regula**r and adv**ance readers

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1. What makes a book rich.. in any terms like it's world.. and etc I don't know anything yet so leaving it as general..?

2.what mind set should I have as a reader should I read everything critically to find gaps and stuff in it or I can do that casually as well..?

3.which questions I should be asking myself on finishing a book..

4. If I feel boring while reading what is the solution to this..

5. And what is your personal technique to remember key points from the book you have read to connect to what you are reading now....like connect chapters.?

6. Any other tips and advice you wanna share specifically is appreciated..

**Thanks in advance guys for Helping...**