I think one of the best "First Building" planes is the Sig Wonder. Especially for guys like you who have a lack of confidence.

Here's why:

It only costs about 35 bucks, and it's small, so it will go together quickly. Once it's done, you have a really FUN airplane, and if you totally screw it up, you only lost $35

Furthermore, it uses a lot of the conventional building techniques that you'll find in larger models, so whatever you learn from building it you can apply to your future builds/repairs.