Tips on a really good blowjob!!! Help ASAP

Okay so I have this guy friend and we’ve been talking for about 2 months.. we’re getting a lot closer and we’ve hung out a few times at school. A few days ago he asked me if I wanted to come over this weekend. I really want to go but I am so scared because I know he wants to have sex and do oral. We’ve talked about it and we’re both keen! Problem is I’ve only given a blow job once and I don’t think it was that good lmao 😂😂 I need help to improve because I know he has high expectations 😋 please comment some tips!!! Help a girl out xx