Photoshop

So I'm sitting here with my Rainbows ad idea, playing with photoshop trying to figure out how to make my idea come to life. Frustrated? That's an understatement! I think that the Ad program needs to have more than one class teaching how to use all of these software. We have Creative 1 and 2, why not have Multimedia 1 and 2? Too bad budget cuts would never allow for that. Anyway, can anyone tell me the website that has the picture galleries? I can't seem to find it. Thanks!