I’ve been knitting for ten years and charts give me a headache trying to decipher. I can work them but it takes a lot more mental work for me…so I stick to written patterns.
When I was first learning, someone suggested trying to learn new skills with each project. I think a hat would be a good next step and then maybe mittens. Once you can master mittens, sweaters aren’t that much different skill-wise. Just take it step by step and come back with questions if you get stuck.
Another recommendation,when you find a good tutorial for some skill don’t forget to bookmark it. It usually takes me several projects to remember new techniques. If I forget to bookmark the good tutorial I wind up getting frustrated and wasting time sorting through all the bad tutorials.
Did you use the same yarn the pattern called for? Yours looks like a chunkier yarn with less drape which would definitely effect the fit.