Hi!!! Welcome!! I'm new too, so what can I say? , first of all, your idea is great, the good thing is that you know what you want to do, thats the hardest thing (to me) , So I just can suggest you to look at the gallery, they have good layouts that can inspire you in your project.
The places to get supplies...almost everywhere, I mean, even Wallmart has scrapbook supplies. I love Michaels, Joann's and of course scrapbook.com. At this time you can find the best prices at Joann's.
Have a nice and happy scrapbook shopping, beware: It's addictive!!!