I agree…food production and preservation. The family needs to eat :). IMO, only chickens; but start with less than 15 (I don’t know how large your family is…maybe 20). Also, I’d start with some fruit trees and/or bushes and/or vines. Trees take a few years to get started so getting them in early is a good idea. Berry vines and plants give a quicker reward.
There are skills that you can start learning now in your kitchen, however. If you can’t garden now, buy stuff in bulk and in season and start practicing preservation skills – lacto-fermenting, proper freezing and/or canning. You can learn to render fat and start making broths and using as much of everything as you can; make butter with raw milk; other kitchen frugality and from-scratch skills that you’ll need later which you can start now.
Also, stocking up on things you can’t/won’t make/produce like candles, batteries, grain, etc.
Oh, and make sure you have a heating source (though in Texas, that’s not a big a deal), but you’ll want to make sure ya’ll can handle the heat without central air. YOu can plant some shade trees as soon as you move in that will eventually help? (thinkin’ out-loud).
Now is a great time to research and start these basic skills, so you won’t have to learn later.