Welcome to the boards, Kitiara.
Nice to have someone else to ask some of the silly questions, that's been my role for the last month or so.
You've got a decently balanced party, and it should do fine. You should look at what Order your paladin is if you want it to gain any more levels in paladin after you've multiclassed over to cleric or fighter. If you are the Order of Helm, you can multi to a fighter then back to a paladin if you wish. Ilmater corresponds with cleric (of Ilmater, naturally), and Mystra corresponds with wizard.
And BoB, Kitiara was the name of Raistlin and Caramon's older half-sister in the Dragonlance Chronicles.