What can I talk about on my first date?

ive been doing this kinda backward lol. so me and this boy ( I'm 14 and he's 15) been texting each other the past few months. and he asked me to be his girlfriend and I said yes. (we talk in person of course lol we don't text all the time) he invited me to go to chinatown, swim and go to barns and noble. the problem is that both of us are kinda shy and I don't really know wqht to talk about. I felt like I kina already know him ....What can I talk about on my first date?
What do you usually talk about? Do you like the same TV show, hobby or other interest? Maybe you could spend the date planning your next one :D or a trip somewhere.

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