Tuition at Al Ain is a good start.
As for buying a kart, it's better to start with a second hand one. There are 2 Chassis agents here, Al Ain sell Intrepids and a French lad sells Birels.
There are quite a few second hand karts floating around right now, but i suggest one of the 2 makes above as you can get spares. Something like a CRG or TonyKart, albeit good karts, you'll have to get parts from overseas which naturally adds to the cost.
The engine has to have an Al Ain seal on it and come with engine card, without these it wont be allowed to race. Write down the seal number and check with Al Ain that the engine is pukka.
Make use of the dubai round this weekend, there are lots of people who will be more than happy to help, and i'm sure a few who will just like to moan! Same as everywhere, dont let them put you off!!
Womble