I found some really easy gringe sig tut, on good tutorials i believe, then I came here and read some more tutorials and I got much better.
Got Adobe Photoshop and spent 8 months or so to get this good, which isn't very good, but i only looked at tutorials recently...so i basically learned on my own.
trial and error is the best thing u can do. because it really works mayby soon youll be making sigs like the pros..
htp://gamerenders.com/forum/ everything you need to know about sig making at that site... good site you should check the tutorial section. you can also get good renders in the render section, the premium render section has even better...