I second the getting tips and how tos from this site before you go out and buy much. I know you are just itching to jump right in but if you take it slowly and and think about not only what you are doing but what will be the next steps and how the task at hand will effect it. I am 63yrs old and have been in and out of this hobby a few times and in the short time I have been here I have learned a lot.
Don't be discouraged by your work not looking as good as someone else . You are building for your enjoyment not theirs. I don't care how good you are someone out there will do better. Welcome to the hobby and don't be afraid to ask quesions
Jon
(nice choice on the kit, you can never go wrong with a Shelby)