How should i kiss my girlfriend for the first time?

just kiss her normal if it seems she doesnt like it tell her its your first time then she will probably giggle.

you can invite her to a restaurant for a meal then ask her to go for a walk .go to some where with Beautiful night scenery.then:
Brace her face in your hand, soften your lips, and apply medium pressure. Pull away, smile, assess her response, and proceed if she is responding pleasantly. She may take a more active role at that point. Also look deep into her eyes. then after that slowly kiss her. It is very normal to be nervous. You don't have to have a make out session the first time. Just see how she reacts.

go half way and let her come the other half. be gentle with a soft touch and thin suck in.

firm and wet.

give her a good long hold lean back a lil look her in the eyes and then just go in for it shes your gf i mean come o shes not gonna turn you down lol

Brace her face in your hand, soften your lips, and apply medium pressure. Pull away, smile, assess her response, and proceed if she is responding pleasantly. She may take a more active role at that point. It is normal to be nervous. You don't have to have a makeout session the first time. Just see how she reacts.

Yes - for goodness sake don't mess up. You must kiss like an expert with no experience. That's what any reasonable girl would expect of you.