Don't kite anything; you won't avoid auto attacks and you'll just make your tank unhappy when you get to group content. Speaking of group content, if you have aggro, bring it to the tank so he can pull it off you. Running around like a maniac just causes problems. ACN/SMN has good mobility for a caster, but the main idea is to move only to avoid AoEs/cleaves or handle certain mechanics, and then only move as far as you need to. Instant-cast abilities can be used on the run, but anything with a cast timer requires you to stand still for the duration.
It's been a long time since I was a low-level ACN (I have SMN leveled on a different character), so my memory of what abilities you have available is a little foggy. Your Damage over Time spells are very strong, so be sure to hit enemies with Bio and Miasma at the start. If you're lvl15, Topaz Carbuncle (Summon II) can tank for you. You'll have Physic, a weak heal, that might help you stay alive at those low levels, but if you continue as a summoner it will be pretty much worthless in short order.
Make sure you do your class quests every five levels, as they grant you new abilities and/or gear.
Also, just in case there is a little misunderstanding, you don't need to create a new character to try a new class/job. Once you reach level 10 in one class you may freely unlock any of the others that are available.
Good luck!
