one thing you might want to do is get verified, you can do this simply by letting an automated message call you and it will put a verified symbol under your name, this will help with some level of confidence by the bidders. Also you can connect with your facebook as verification as well if you have a facebook account. Once your first auction goes smoothly, people will see and have more confidence. I wish you luck on your auction.
for future reference, you can use the "advanced options" when you post an auction to start it exactly the way you want. You can control the number of days, and you can control what the auction starts at (up to 100 credits at first). You'll get the hang of it in no time! :) fanned & watching & bidding