I need tips from girls STAT lol

I’ve given like 5 blowjobs in my lifetime and I’m sooo bad at it. Lol. It’s not that I have a gag reflex or anything I just don’t know what feels good to the guy. Do they like me to use my tongue? Is it better if it’s all slippery or is that nasty? Lmfao this is so embarrassing but I seriously need some girl tips and tricks to make it better for both of us 😬 (I know I can ask him but I’d rather just surprise him by being better at it lol)