I want to emphasize that I don't expect you to post super polished texts here. Of course it's desirable that you edit your writing before posting; but consider this space as an opportunity to explore, experiment, test out ideas, put yourself out there, interact, etc. It's not about getting it "right."
Also, you may very well want to respond to something you've read early and perhaps pose a question about a text or your understanding thereof. Others might reply to your query and help you work through something, even before coming to class.