You said in one of your comments that she has the same feelings as you do, that she's starting to question her sexuality. If she's willing to help I don't see why you'd hesitate to not accept it, especially since that would be helping her too. Why should you feel weird kissing her since I see girls kissing each other all the time. But like a couple girls already said here, girls kiss a lot so just do it and if it goes good then kiss some more. No harm done. Let it lead to wherever it goes. If either of you aren't especially excited after your first kiss and kind of laugh about it, then just laugh if off and say like thanks, but it was fun anyway, wasn't it? lol! No need for anything between you two to be weird after that. Besides she offered to help you.