Here you are learning how to make use of the infamous G-spot, and allow it to do what its meant to do.
A big tip is to always gently ease your way inside her, you don’t want to ram anything in there, and always ask her what she prefers, some females may not even like being fingered so keep that in mind. But always go on how she feels and what she’s currently in the mood for. Remember this is a team effort of which you are both trying to reach the end goal of pleasing each other.
Also keep in mind that not every girl is the same, and some may like it in different ways and different positions, so its always best to ask her “do you like that”.