Lynda... I wish we were going to the city earlier and then I would come and teach you all of the tricks to the program. As it stands now, our next appt with specialists is at the end of March.
For resizing, make sure you save the full-sized image first. Then you need to resize it to 7"x7" and 72dpi (all 3 boxes to have 'x' in them). After that, got to "file", "save for web". Adjust the slider for quality level to keep the file under 125kb. Hit "ok", then name your web photo. When you go back to the main file, "undo" the resizing to get your large page back.
For moving items onto your page, I cheat.

I open the item I want to use, right-click on the layer in the layer palette, select "duplicate layer" and then use the drop-down to tell it to duplicate into the file where I am creating my layout. Then I can close that file. Drag-and-drop also works, but for some reason I prefer the duplicate layer method better.
Just shout if you need more help, and congrats on your purchase.