i need advice??

ugh I don't wanna post this on here but I need advicee so I just wanna know how to get over the fear of giving a blowjob?? it sounds stupid af but like I want to, but I'm really scared to do it and when I actually have the opportunity to I can't do it. I was molested when I was 3 and it involved oral sex so I guess that's why I'm scared about giving one now. so I just need advice on how to get over it?? I don't want guys getting bored with me cause I can't suck dick :'') sorry for asking