Opinion needed

I’m a new investor and still learning how to do it,

Firstly i was very risk averse so I decided to go just with etfs.

Now I’m thinking that I did a bad choice since I’ve lost some good opportunities. I’m 16 so the broker account is in my mom name and I didn’t want to sell the positions since they have already done some profits and we would need to fill them in the tax report. I’m thinking in only selling $RARE (-0,07%) .

Now I’m thinking in buy some individual stocks and would like to know your opinion in my portfolio and also in my thoughts.

I’ve studied a little of these stocks but would like to know how to do a more deep analysis, how should I do it?

I was thinking in $AMD (+0,01%) and $AMZN (+0,53%) primary but also in $AAPL (-0,1%)
$NVDA (+6,67%) for long term.

Also $CIFR (-1,97%) and $IREN (-2,4%) for the medium term.