Advice!!!
 

I'm so curious :) But a bit nervous... ... Any advice would be wonderful!

Yeah - - I'm just full of advice - - but . . . you need to be a little bit more clear as to what kind of advice you want. I assume it may be related to the GH. But beyond that . . . . ? ? ? Are you wanting to go to a g-hole arcade and need to know what to expect?? . . . curious about the proper ettiquette on how to proceed to get sucked?? . . . . or . . . what the procedure is to do the sucking? ?
This is the right place to get answers - but don't be afraid to be specific. As you read some of the forum posts here - you'll see that you can ask or chat about anything G-hole related. Open up - You'll get the advice you need - and maybe have fun learning about other folks experiences too.

well etiquette, if I should be nervous...

OK - I guess it's baby steps. No - you should not be nervous. Again - I don't know specifically what situation you're talking about. But - maybe you'll provide some more details.

You'll know
 

If you walk in the place and get butterflies in your stomach, you are nervous....of course.
Just go to a booth and start playing a movie. You don't have to do anything you don't want to do......
Relax.
You'll figure it out.

My advice: when in doubt, whip it out!

It's easy. Get into a GH booth at an ABS.

Wait for someone to step into the adjoining booth. If you want a blo, make sure your cock is out and hard, make sure it's visible to the guy in the next booth. If he's interested, he'll put a finger through the hole. Then stick it and feed him.

If you're wanting to suck cock, it's the opposite. Finger through the hole, and see if he sticks it through. If he does, blo him.

Anticipating one other question - yes, if he takes your cock into his mouth, it's assumed he won't mind you cumming in his mouth. Vice versa's the same: unless you tell the guy "don't cum in my mouth" (and risk him going looking for a proper cocksucker).