Hey mate, I know this is going to sound like spamming but check out www.mmmilan.tumblr.com I just made a post about pretty much exactly this. I started out as the "idea guy" and have started hacking on my own project.

Some advice that worked for me, take your idea, and strip it down to the one function that makes it valuable. Learn how to do that. There's lots of good tutorials online. I never did the tutorials word for word, I just used them to learn functions that would apply to my application. Also, don't be tempted to fall into just copying and pasting code. Learn what it means, write it yourself, tinker with it.

The stuff that BAFFLED me when I looked at it originally makes perfect sense now. It comes to you, don't get stressed out, just take it in steps and you'll be shocked how far you get.

Feel free to email me, I'm in no way some master coder but I know where you're coming from.

Cheers and best of luck!