Howdy and welcome to Texas! If you are about sliding your car around, then here is the forum to find the local drifters at
Fabricated Motorsports - Index . There are lots of events to go drive at, with lots of friendly people at them. The majority of the events are located just outside the Fort Worth area, with some Houston ones, and a few others thrown in for good measure. These events have instruction for completely new people, and awesome tandem for the advanced drivers. There is something happening every single month as well.
The next event in our Formula Drift Proam Series down here happens on November 11th, and here is the facebook event page.
Final Round of the 2012 Lone Star Drift Series | Facebook
As for shops, depending on what you need there are plenty of places to go. If you need fabrication shops, tuning shops, or just parts, you kind of go to different places. Hit me up if you need recommendations for something specific. I am not a shop but I know of a lot of them around Texas.