Cant give blowjobs

I'm in highschool and yesterday I hung out with my Boyfriend (hes my first relationship)

he wanted me to give him a blowjob. This was my first time doing it, I didnt do it for long since I was really nervous. I had no idea what to do and he wasnt telling me what to do either, In the end I made him cum with my hands but when we facetimed that night he said

"You should watch some tutorials on sucking dick"

He was trying to be super nice about it but I felt so ashamed and stupid and like I was really terrible. He tried to reassure me and tell me that it's okay and that we just need practice and I shouldnt be upset but I have no idea what to do I'm too scared to try it again what if I do it worse next time.