My gains and what I've learnt after 1.5 months @ 16 yo

In mid April I started with roughly a year of allowance and gift money saved up and bought ai related stocks, such as nbis, mu, sndk, and mram Bought mu right after it fell 30% and held it for a couple weeks, making me think I could time the market (I couldn't). When I sold all of my mu position to transfer the rest of my money from cashapp to fidelity, and using that to buy more sndk, it shot up nearly 20% like a month later while sndk "only" went up 7% on the same day. I can't provide proof of