I am sure you will be able to do what you want with your art. All you have to do is keep at it. I have never stopped practicing since I was a child. Many years of practice. I feel each picture I do is practice for my next. I will only give criticism if it is ask for. That is part of the way I learned to get where I am today with my artwork. I used to belong to a site that was all about constructive criticism and it really does help as you say. Welcome and glad to meet you!