First, here's a link to the tutorial section here at SBB
Tutorials.
I know exactly what you are going through, but you'll be fine. One of the things to start, is to locate the items you are familiar with from DIP. They are probably there in PS, but maybe just called something a little different. For example, I think DIP calls it a stack, but in PS it is called a layer. And instead of a column along the right side, PS has a floating layers palette, but they basically operate the same.
Since Microsoft is the maker of DIP, the menus have looked very familiar to other MS programs, so one thing that will be different is that things will be located in a different place, but when you find them they will function nearly the same.
And I know people have an aversion to use Help files, but I've always found Adobe's to be very good. Check out the Work Area section and the Layers information in the Help also. And thankfully, Adobe did put the Help section in a familiar place.
We're ready for all your questions here also, so fire away.