advice?

so me and my boyfriend cant see eachother over summer and i told him i would send nudes cuz he always tells me he is horny but like i have never sent nudes before and idk what to send like i dont wanna be too exposed and i just dont know how to not make it awkward. like what should i send, how should i pose, would like a picture of me in my underwear be okay too ? please give me as much details on how to take the pic as possible