I need help!

[city_ofthe_south]

eh, this prolly doesn't exactly help but if you draw pretty well then you could always do it on paper. maybe look around for airbrush or marker tutorials online to help you with the coloring. if your drawings skills are only OK then a grid can turn you from OK to pretty damn accurate at least. As a side note, I use Adobe Illustrator and I started out on a weaker machine than you described many years ago. It worked ... though it sucked pretty hard. I drew many cars with it. There are lots of digital options out there asside from 3D.