It may take a while to find out (it depends) but you can go to the list of gods on the site and read about each one and see the ones that catch your attention (this is not a rule but it may happen that a god that caught your attention is, it varies a lot).
You can use pendulum which is a quick way of communication.
In time you will know. What matters now is that you get past the begginer stages of meditation. Remember to do yoga as well as this will unblock your soul.
It makes more sense to get past the first parts and then seek your GD as to not waste time and then they can start helping you figuring out what to do for you yourself to advance in the matter that works better for you.