I think the best way to learn 2D in DBPro is just get stuck into it. Give yourself small goals e.g moving a ship around the screen or getting a character to jump up and down. Once you have accomplished these, build upon them like adding enemies etc.
But if you do have your heart set on tutorials then it might be worthwhile to invest in the DBPro books available. I own a copy of DarkBASIC Pro second edition which has 2d tutorials but I use it more for reference than a tutorial.
A clever person solves a problem, a wise person avoids it - Albert Einstein
