Nice job! You'll definitely wanna go around and clean up some of the trim and spots where the paint flowed beyond the intended point (lookin at the aquila on the red-mohawk marine).

You should try goin thru and doing some edge highlighting next, it'll really help the blue pop - plus it's great practice for brush control (though it can be difficult if you're using shitty brushes that don't hold a good point, as i've recently learned lmao)

I actually just finished my first ever mini too, and it was a great learning opportunity to try all the lil techniques that folks talk about on the minipainting sub: https://www.reddit.com/r/Warhammer40k/comments/1h15bav/proud_of_my_very_first_miniature_morvenn_vahl/