I agree with kerwoman. Keep playing your guitar. You will get better if you stick with it. I am mainly a singer, but if I relied on someone else to play for me I wouldn't be able to play half of the songs that I do because most folks don't play a lot of the stuff that I do.
You might want to learn keyboard some. It's a very good insturment to compose on and one of the easiest insturments to learn. All of the notes are there in front of you, literally in black and white. It only takes a few hours to learn to chord with your left hand while you play the melody with your right. (check out "Piano In A Flash")
Don't give up, you'll get it if you keep trying, but youre not going to learn guitar in a couple of months.
You go Girl!
Merlin