well...i dunno wbout paint shop pro...but i know u can do awesome stuff with photoshop....i use photoshop cs2 and it has served me well! it's not the BEST digital painting program..but u can do0o sweet ass art with it....i know that alot of ppl like using programs like Painter and Open Canvas...soo0 u should look into those as well....Painter and Open Canvas have ALOT more tools and effects to bring a traditional feel to ur digital art....
idunno whether they have tutorials for paint shop pro,, but try www.deviantart.com they have some pretty kool tuts....just type in "tutorials" in the search bar....^_^
o0o if u wanna see wat i've managed to do with photoshop...check out my page