advice on sex

i’m 15 and am thinking about having sex with the boy i’m talking too. he is turning 17 soon which means he is two years older than me. he isn’t pressuring me in any way at all to have sex with him, i dont think we’ve even spoken about it before. like i said, i want to do it but i am so scared. what if the condom breaks, what if i don’t cum, what if it doesnt feel good. is there anyway for me to get over this? and is sex really as scary as everyone says it is ?