eh i wouldnt bother with reflections, waste of time imo. What you want to do if ur new to gfx is get the basics right and then when you start getting a lot better (not perfect as thats impossible

) then start playing around with things.
As far as the sig goes, if ur new to gfx its not bad. The effects on her are pretty good, just watch out though because you're verging on FHS in this one, its not there, but its close :p
The backgrounds a little boring and plain, it sorta works, but id do some smudging or something as you get more used to gfx
text is wrong, but its not the worst ive seen. Id not bother with text at the moment, i still dont always bother with it because it can (and often does) ruin a sig. In this case it doesnt ruin it, but something just isnt right.
Overall rating seeing as you're fairly new to gfx id say 7-8/10
Its one of the better 'beginner' gfxer's sigs that ive seen. Keep at it and you'll get there.