Hi, Im a 27M, Im going through some hard times (kinda broke up with long term gf) and just need to clear my mind. I saw that tickets to Paris are really cheap, so I decided to take a little trip alone. So my questions are:

1. Is 5 days enough to experience Paris and still have some chill time? Or would you recommend more? I can either stay throughout 30.10 - 3.11 or 30.10 - 5.11. The plane tickets are the same price dor both options, its just a matter if its worth the money for hostel and food for 2 extra days? I want to experience some landmarks take some walks, read a book, thats why im scared that 5 days is not enough. On the other note I dont want to get bored and just throw away 2 days if i will be a crazy tourist and do everything in 5 days.
2. Where can I meet some people and are they open to tourists/strangers?
3. Is Paris safe?
4. I love rock music, books, video games and all nerdy stuff. Any place recommendations?
5. Some good and cheap hostels I should know about?