Critique wanted, beginners painting
So I'm currently trying to teach myself how to paint with acrylics from online tutorials and what not. I've learned quite a bit and was wondering if I could get some feedback and helpful thoughts? Thanks! Also, is there a way to get an aquamarine blue with just using Liquitex basics? I have Naphthol Crimson, Ultramarine Blue, Cadmiun Yellow (medium hue), Phthalocyanine Green, Titanium White, and Mars Black.