I'm seeing this chick who is super into me and a lot more sexual/sensual than I imagined (using a LOT of tongue on first date)
It's unclear why you think she's "a lot more sexual/sensual than you imagined"? Because she used tongue? Or did she actually tell you?
I see many assumptions being made here - she's a slvt, she's a hoe, and advising you to not LTR her because of this one comment - she used tongue and you "made out." SMH
Last I checked, it's quite standard to use tongue when kissing, even a first kiss. And making out is not uncommon either when there is a mutual attraction and chemistry which it sounds like there was.
Hell, she could be a virgin for all you know but a great kisser! And really into you.
Unless she told you her notch count and it was high or she otherwise told you she's f*cked a lot of men, I wouldn’t assume anything especially when it's based on how she, um kisses?
Don't say a word about your inexperience; if the chemistry is right, it won't matter and you may surprise yourself with your ability to be passionate and a great lover.
Despite popular opinion much of how good you are is based on instinct, mutual chemistry and desire and how well you vibe physically and emotionally in my opinion and experience.