Omg, mom just gave me 20k for my 18th birthday. Which stocks can I invest this on?

I've given her the hint that I'd invest the money she'd give, so she told me I can invest about 20k money. I have learnt basics of technical analysis, indicators from youtube. I've done basics of fundemental analysis, how to apply on IPOs and a lot of basic stuff. Now when it comes to actually investing/trading stocks, I do need some brotherly advice. How do you suggest I go about it? Appreciate you all :) <3