Confused and need some advice

Hey guys so I've been dating my boyfriend for almost a year and he's the sweetest guy ever..he's my prince charming (that's what I call him lol) and our relationship is fantastic and perfect but lately he's been asking for me to give him a blow job (which I've never given one before) and I'm kind of scared to give him one because I'm afraid it won't be good. He also knows how I feel about them and I just don't know what to do..do I just go for it and do it or talk to him about how I feel..I'm just afraid he'll get mad cuz I don't want to do it. Can I please get some advice?😣