/biz/ - Business & Finance

First of all I want to say that I'm very disappointed in /biz/. I've lurked here for some time and the amount of wojak/pepe shitposting is ridiculous, It's worse than /v/ and /pol/ combined. You'd think that /biz/ would at least be some what semi-serious board.
And second before you read further this is an advice question, I wasn't sure if I should post it in /adv/ or here, seems more relevant here.
I'm pretty poor, student, live with mom. Just got and paid off drivers license and new PC. I don't have to worry about rent or food(thanks mom) and I go to uni for "free" and get $305, loan free, every month. I have 2 1/2 years left in uni. I used to spend all my money on video games, now I don't feel like buying anything. The bitcoin thing sparked an interest of some kind of investment, not specifically in cryptocurrency but any kind of trading.
How would I start with investments? Say I could put aside about 80% of my income every month, how much should I save up? What sites to use, any approved tutorials? Or it's just not worth it for me? My goal here wouldn't be really "profit or die", of course profit would be amazing, but more of a game/hobby etc.