What Feek said, pick a very loved subject matter, and go from there!
The things with studio modelling, its addictive, and overwhelming, but time and patience is the key!
A lot of donor kits you may end up buying, will also be used on other subjects, and most kit lists, are the same for each model, especially from a SW point of view, its just a matter of piecing the puzzle together, but it comes with time...and in time, youll find yourself part ID'ing like a madman and pulling your hair out...all part of the ......fun? :lol
Simple..ish starters, TIE bomber? I think many have gone down that road, and there is a wealth of knowledge on the subject, hell, the Probe droid pods are a great simple one to start on, very easy to do, and not too bad on the wallet.....different too, something you dont see everyday lol, again, all depends on your choice of subject matter!
Good luck.......lee