I think I can add something to this - the first 5 or 10 seconds should just be lips.
Then if you want to go for a french kiss, try to stick the tongue out towards the other, but not past their teeth - just put it out there a little bit and bring it back in again.
If their tongue tries the same (or you're sure they would have, if they weren't so shy), try it again, a little further.
Ideally both people should try this move simultaneously after a few warm up tries, and the tongues find each other and try twisting round each other a bit, but still retreating back into their owners' mouths every little while (this aids breathing and stops tongue-strain - yes it's possible). These take-back-tongue moments are often the time to tilt your head the other way if you feel like it.
This may not be exactly how everyone else likes it - and it's clearly not what your average severely intoxicated straight male will do - they seem to try to suffocate the girl with their booze-tasting tongue - but I think it's a good starting tactic. Details should be worked out with the partner at the time.
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The rule for today.
Touch my tail, I shred your hand.
New rule tomorrow.