You're like me I think. I am always worried about critique etc.
But the thing you have to realize about poker, or any skill that isn't mostly intuitive (you can figure it out on your own), is that you're going to make mistakes, and a lot of the time you won't be able to magically find them on your own.
I won't go on a rant about the adult learning model here (been re-reading/listening to the Mental Game of Poker), but many of the mistakes you make early on in learning skills will be unknown to you. And if you don't know the mistakes you are making, you can't work to fix them.
Plus, this is probably the friendliest forum on the internet, not just on poker... So we'll be gentle
Just think of it like growing pains - it's a bit uncomfortable, but it's gotta happen if you want to grow.