Giving a blowjob

Hey guys,

So this guy I am seeing has asked me if I would give him a blowjob, I have never given one or wanted to before but I do now, but my problem is whenever it comes down to the moment when it would happen I can not get out of my own head about me being bad at it and doing it wrong or just keep overthinking the whole situation in general. Everyone I talk to says they arent that bad and its easy and ask for tips of what the guy likes. But I just need help getting out of my head, any suggestions that might help?