I was about 24 when I started getting interested in porn, too, and TFP helped me a lot with that, too. (I also started having sex when I was 24, incidentally, lol.) And yes, as a woman, I am more turned on by the ol' in and out than anything else. I love hard-core video shots, just the penis pumping in and out of the vagina, please.
Oh, I also like to watch women making out, though anything going on below the belt with lesbians doesn't interest me too much (in porn). Mostly I love to watch them kissing and playing with each other.
Congrats on your newfound interest... enjoy yourself!