Beginner Questions in the World of Cryptocuurrency

I am curious about entering the cryptocurrency world.

I have a few questions about how to get started and if there are any guides someone could supply me with, that would be great!

1.How is the value of cryptocurrency determined?

2.Is there a way for me to see all the values?

3.What are the ups and downs of using cryptocurrency?

4.In your opinion, what is the best cryptocurrency to buy today?

5.When is the best time to sell my cryptocurrency?

6.When should I invest in cryptocurrency?