So I've been meaning to ask this for a long time, but I know there are various people out there who have at least some experience in art, graphic design, publication, and what have you, or who at least know someone that does.  I'm not able to take college classes or spend any money right now, but I do have a legitimate student copy of Adobe Creative Suite 2, including Acrobat 8 Professional and Dreamweaver as extras.  I'd like to put them to use.  In particular, I'd like to be able to learn whatever things I should learn in order to design marketable PDF documents (whether or not I actually attempt to market them).  These are skills that I think would be useful and that I'd like to have.

Does anyone have any tips for getting started with this?  Any resources a beginner like me could use?  I mean, I've mostly done little more than fiddle idly in Photoshop and Illustrator in the past.  So where should I start?