I joined 5 months ago and I can tell you the first article is the hardest. There are so many great writers on HubPages that you often wonder if your topic is interesting enough. Now I believe if it interests me, then there should be at least one other person who would also be interested in what I write.
Finding topics to write about is the hardest part for me. Anyways, I've found that most Hubbers are very supportive and offer great feedback.