If you're going to be creating prototypes, that's above intermediate, so you're looking at a significant investment of time in any case. But Lynda.com videos ar

If you're going to be creating prototypes, that's above intermediate, so you're looking at a significant investment of time in any case. But Lynda.com videos are helpful, but also look at Jesus Ramierez's videos, Phlearn, or the videos available in Creative Cloud for PS. Photoshop is very powerful and can be used for all sorts of things including video editing. There are so many features that it's easy to get confused if you're trying to just do photo editing, or just do product designs, for example. But I'd recommend diving in and figuring out how to do what your goal is really well and not worrying about the other capabilities until needed or time allows. Of course what it will eventually boil down to is just spending time working in the program. Lots of time.