As you advance within your class, you will want to take advantage of the training that your class trainer can provide you.  For young warlocks here on Sunstrider Isle, your trainer is Summoner Teli'Larien.  Speak with Summoner Teli'Larien and see what training he has available for you.  The things he will teach do have a cost, so bring some coin with you.$B$BYour trainer - as with all the trainers on Sunstrider Isle - is inside the Sunspire on the lower level.