<human>: I'm a completely inexperienced high-schooler, who's not particularly confident about my body. Neither of us have a clue what we're doing: she was my first kiss, first girlfriend, first struggle with a bra, ect. And now its clear that she wants to take it further than just rolling around on a couch kissing and feeling. 

Of course as a hetero male, I should be happy to oblige. However, I'm nervous and a apprehensive about it. I don't have the kind of relationship with my father where I'd talk to him about this stuff, and I'm the eldest in my family's generation... so I could use some "big bro" advice here.

Give me a shortened version of the text
<bot>: I'm young and pretty clueless about myself, girls, and sexy stuff. Need a "man up" talk from an older brother I don't have.