u/Best-University-1309

So me and my boyfriend, who is a trans guy, (was born a girl) have been together for three months. Last month for my birthday we where intimate but I could not return the favor to him because he was on his period. Now I am so nervous and scared for when I have to. I have no idea what I'm doing down there and if I can even do it. I'm scared I'm going to hurt him or he's not going to like it. How do I get over these nerves and seriously any tips from anyone?