Well let me start by saying that a Tamer/Mage is a great character to start with, so good choice there
I wouldn't restart though, not when you already have those points in Taming. There's no need to restart, remember there aren't any 'fixed' classes in UO so it doesn't matter how many different skills you have in your template, just keep training as you are with Taming/Lore/Vet & Magery/Eval/Med and you'll be fine.
As for being an Elf, yeah imho they are slightly better suited to being a Mage/Tamer for two reasons, 1. You get more mana than humans, always handy for a Mage, and 2. Only Elves can tame the Cu Sidhe. But you'll be a long time before you are taming a Cu, so don't feel you have to go Elf. If you prefer human then you'll get on just as well.
Don't worry too much about being Elf or Human though as no matter what you pick, you can change your race in-game after you start, so you're never stuck with which one you choose.