For gaining knowledge you can read this article
https://www.coindesk.com/information/what-is-bitcoin/For trading ,I can't suggest anything , because price of BITCOIN is very volatile and unpredictable.
It's price totally depends on demand of BITCOIN.
I suggest only "Don't hurry in investment and Don't panic at the time of market crash "!
Very well thanks, since you've mentioned about investment I heard a lot from my friends that If I'm not into this posting thing here, I can maybe invest which is something that interests me, cause it's kinda easy to understand and do, but then maybe I need to dig more informations on what to do first.