Depends on how much you're willing to stick at it. I believe learning to play on a crap instrument first made me a better guitarist in the long run and, when I finally "upgraded" I suddenly felt like a guitar god in the making.

IMO you should only invest your hard earned cash in an expensive guitar if you're 100% certain you're not going to quit after a while.

Stick at it. Learn to play all the open chords well first before you even attempt barre chords. Get through the pain barrier and train your muscle memory. It will come.

BTW, I learned to play on a cheap acoustic. It was he'll and I sounded utterly shite for a while but I found when I could finally afford an electric, it was, in comparison, a breeze to play.