My dad taught me at a tender young age.
In your case, the best thing for you to do is go on a guided hunt. That way they will be able to show you and teach you hands on what to look for and what to do. They will do all the heavy work and show you how to do it.
A greenhorn first time out alone, I can't even imagine what that would be like, and it could completely turn you off to a lifetime of fun and excitement.
Things can go wrong very quickly out in the deer woods, and some degree of being a woodsman is critical especially in a national forest where every tree and trail looks the same.
Read, pay attention, and try to learn as much as you can, because even if you find a person who can help, you have to know their language, as they may assume you know what they are talking about.
What Jimbo said. I was brought up in the woods. Dad and I spent a lot of time out there either hunting, fishing or camping, so I already had lots of woods knowledge before I even went on my first hunt. Same with my boy. I would take him with me from the time that he could walk, so he already had general woods knowledge before he went on his first hunt. I would imagine being totally green and going out to public lands for the first time with zero help from someone that knows what they are doing would be super tough. You say you don't know anyone who hunts, but in reality, if you live in Texas, you probably do have a connection. You may just not know it yet. I like the facebook idea. You might be able to make a connection that way.