If she's not tested positive, then you shouldn't be too worried. As long as she keeps up on personal hygiene, it shouldn't be a problem. However, if you "hear" she's cock-hungry, then I'd probably stay away. Has she had an active sexual-relationship beforehand? Really, just asking her if she's gotten' tested before wouldn't hurt. If she takes offense to it, fuck it. She's too much of whore to understand your worrying. And although it would seem very rude for some, but if you're really unsure just explain yourself.
She'd understand and get tested/tell you if she's infected with an STD. But even if she's clean and tested negative to any STDs, you shouldn't just go in there. It's great to see you mentioning condom-usage, but really the only way to really the feel for it would be vaginal or anal intercourse. If it's your first time, it shouldn't be a problem. Some virgins tend to orgasm faster then someone experienced.
Also, you and her should prepare. Shower beforehand, trim a little, just look nice for each other. That way it won't be a smelly and potentially sickening experience. Just try to enjoy yourself overall. Go slow your first time, if not - Do some foreplay to lighten up the mood. Hell, even if it isn't your first sexual experience, go for it anyways. SO YEAH. HAVE SECKS 'N' SHIT.
