and good luck.
I think it's about the best time to get chickens. It is a little more work in the winter brooding chicks but you will have them outside right when the bugs start coming out so you get right on top of them and you will start getting eggs April/May when most people are just starting chicks.
I am in West Central Texas (south of Abilene) and you are right...it is cold...still in the mid-30's so far today. You will first want to be sure that the chicks, as they grow, have adequate heat in their brooder. Each hatchery website has detailed instructions for that so I won't waste the space repeating it here. Usually around 8-10 weeks your chicks should be able to withstand outside temps. The most important things are make sure they have their adult feathers, make sure they have a coop that they can be totally out of any direct wind yet has adequate ventilation. I would suggest that you not use supplemental heat once they are moved outside. Chickens have the ability to self-regulate their body temps once they are that age and supplemental heat just disrupts that ability. I have 22 adult hens that are doing a lot better than me in this cold and they live in a metal coop with a concrete floor. They have deep bedding (mix of shavings and straw), nice spacious roosts where they can share body heat without being crowded and a healthy diet that helps them stay warm. Also, I have 7 nine week old roosters that just went out to their bachelor pen a couple of days ago (yes in the freezing weather) and they are just as happy as they can be.
