Tips for going to the gym with my crush, when I’ve never been to the gym before?

Anonymous
I’ve got a crush on my friend’s brother. I know, I know weird whatever she’s the one who set it up. Anyway, he saw my other friend at the gym today and he asked her if I ever go to the gym with her. I don’t go to the gym period.
He was then talking to me about how I should go to the gym with him and he can show me a couple of things. Only issue is I’m a bit chubby (I’m 163cm/5’4 and 60kg) and I know nothing about the gym so I don’t want to embarrass myself. And how do I look cute cause I’m not going to wear shorts with my fat thighs. This guy is so muscly and hot, I do not match his vibe. We’re both 17
Tips for going to the gym with my crush, when I’ve never been to the gym before?
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