Hi J,
enjoy your stay at the forum
Gravity is a good element even though it's rather slow. If you're interested to see some mono gravity decks go to the deck section (can't give you a link because I'm on my phone
). Other than that take a look at the cards in the bazaar so you learn how they work and battle against ai3 to see some common deck strategies. Also, we have a list made by Chapuz (well known member here) with lots of synergies between the elements.
But my main tip is to have fun and try out lots of stuff to gather experience ;-)