First off, never put a poll again. People just use the poll and don't comment you. Second, that's very good for a first-time.
Don't give people the option to say that it is good or not. If you do, not only will you get the honest answer, but an answer that isn't for your experience level. Your signature, in the common eye is not good, but for your first, you've done just fine. In addition, you will also find with experience that people will vote 'no' just because they can.