I know if I want my work reviewed here I need to make critiques to other people's work before, but I just can't do it. I don't have any confidence that I can offer any valuable comments. Most of the time I don't even know why I like or don't like something. Only by reading other people's reviews I can think that I agree or disagree, but I can't come up with any analysis by myself... I'm desperate to have my WIP reviewed. How can I learn to give a constructive critique?