Trying to get knowledge
Forex trading is really challenging , crypto is very much volatile to predict the market , BTC is still down since last 2 years.
Welcome to the community, @pantheo.nigrum. Start with the education section here. It’s the best place to start for beginners. Good luck on your fx trading journey.
Hmmm. 
If you’re trying to decide which one to focus on, I would suggest giving forex a shot. 
I feel like it’s the most stable one compared to the others. With stocks, it might be best to wait for stock prices to plummet during the recession before getting in.