I know that you will hear this alot on this site but it is true. Meditate!! It will help you with both and also pay attention to things that happen to you troughout the day and you may come to see that you feel more drawn toward one element more that oters.
Yes Meditation is the best start. It will most be helpful in this process. Also while doing meditation, try working with energy manipulation as well. It also focuses on energy works. In this case would be good for elemental works.