This is embarrassing

I'm 27. I've never gone down on a guy. Like ever. Not gonna go into reasoning. I need tips. Pointers. Help. Anything. Like how do I initiate it. Does it need to be hard before I go down. Special techniques. Something. Please. And no bashing me please. I'm just finally ready to try it and even tho he says not to be embarrassed I dont wanna embarrass myself.