Hello!
Well, you can buy BTC or if you have altcoins just exchange them on BTC. You can start mine, but it's more difficult. I can recommend you some good and trusted sites where you can buy or make an exchange
Yes!! I agree with you!Paper wallet one of the best, you can select it.
I wanted to say the same! Don't really understand why he posted thisI also found this article which is very well written.
It's a beginner guide on Bitcoin
I leave the link here : What is Bitcoin?