Blow Jobs

Okay, so I know this is a little weird and please don't judge me... So my husband and I have been married for a year now and I have never given him a blow job before and the reason is, is I've just never done it before... I dont know why I just never thought I'd like it but, I know he would like it and I want to pleasure him. I'm also kinda scared I'll bite him and hurt him and I don't want to hurt him. Any suggestions on how to do it right? Like.. I don't know how else to put it... I'm just so curious