It's decent...
First off, and I'm echoing Marcato's sentiments here as well, please don't ask for special treatment based on your age. When you submitted your flash, you agreed to this:
"You understand that by clicking "SUBMIT" you represent and warrant to Newgrounds that you are of the age of eighteen (18) years or older on and that all of the biographical information relating to yourself is truthful."
So, if you're not 18, it might be wise to be quiet about it, and let your flash stand on its own merits.
That said, your flash looked decent. My biggest suggestion to you is use a spell checker before you post a tutorial that's heavily dependent on text. You had many, many spelling and grammar errors, and that makes your flash look sloppy.
Otherwise, this was a good start. I think you could add some more items to it and make it a little more comprehensive, but for a first submission, this wasn't bad.
Now go develop your flash skills some more and impress us with your next movie!