The best advice is ask her what she likes.

My personal feeling is start slowly and gently and wait for her
cues. I'm married 18 yrs. and LOVE oral sex, by now hubby knows
what to do to send me over the edge.

But it took time and patience.

Also, let her know you're enjoying it. There's no bigger turn-on
than to know your man loves the taste of your pussy.

I love the sounds of oral sex..................the slurping, and licking
noises turn my thighs into a set of vice grips. I also love a long
lingering kiss afterwards, I love tasting my pussy on his lips.

I guess what I'm saying is, be gentle, be loving, and be sensitive
to her feelings and do what feels good for her.

when i've been down 15 to 20 minutes i love to rub my whole face in her pussy. she seems to like it and when i'm done she likes her juice off my face