You should do whatever you feel like - that's what I stand for. If you don't feel like writing anything and you know you're not good at this, just don't. If you want to write but you're not sure if your text is good enough - go ahead. There will be always somebody who appreciates your work and some critics that will help you develope your skills, to find your style, to avoid mistakes in the future. It sounds like a cliche, I know, but listen to yourself!