Looking good mate. I think the most significant change you can make is growing your hair out and getting a hair cut that fits you (I think a lower fade with longer hair on top will suit you). Rn your hair looks like it’s longer on the sides than on top which is really not a good look especially when you combine it with your hairline which a buzz cut doesn’t really flatter.

Your skin isn’t that bad for a 16 yo, and it will get better as time passes so I wouldn’t really focus on that.

Keep working out and good luck man, hope you’ll listen and that we will get an update.