I spent one miserable late winter/spring in New England burning wood for heat, I have thoughts. There's a difference between burning wood in a fire pit vs. fireplace/stove. Green wood is awful to burn in a firebox: smoky, prone to flameout/smolder, slow to coal, coats the chimney/stovepipe with creosote. In a firepit, you burn enough scrap lumber to get a fire going, you can burn damn near anything if you don't mind smelling like firepit.
Compared to Eastern White Oak, Southern Live Oak seems to cure faster, especially in Texas heat. If you want to ensure quickest seasoning, fold a tarp over to a width to cover the top of the wood stack and weigh down with a few logs to keep the bulk of the rain off. As previously stated: The general rule of thumb with most hardwoods (oak) is about a year, but if you have a good airy, dry, sunny location, you might be able to get away with 9 months.