Here to give some criticism, ahah qwq
you seem to have a good grip on lock alpha, but for some reason there are a lot of random floating likes and portions of the design that go outside the lines? I would suggest fixing that, and always remembering to use lock alpha when you need it!
It also looks like you aren't using smoothing. I would suggest using that for any design, and if you're trying to go for something that decreases / increases in thickness as you go, you can use the [ and ] keys to change the size of the brush, or draw them on a different layer and erase to get that look!
The colors look decent [although use saturation carefully], you're good on that front!
I hope this helps some! I can't wait to see more from you!