I have as much anxiety about posting as I do about talking to people I’ve never met (A lot). I feel uncomfortable with two word responses “nice work”, “I like it”. I am not an artist and have no art of my own. I don’t feel like I have anything to say, and if I do, I don’t know that anyone wants to hear it.
To me your English looks amazing. I’m working on my own anxiety, I’ve made a challenge to myself to post twice a week and make a bit more of an effort to post more comments when something is on my mind. So long as you don’t violate the rules here, the worst that will happen with posting something that people here don’t like is it doesn’t get voted on. Maybe someone will post something mean, but just block, report and move on. Statistically there is at least one other person here who is into whatever it is you post.