Rebecca, First go to the top of this page and find groups, click on county groups and scroll down to find the county(ies) you have minerals in. I see you are in San Antonio so maybe your minerals are in the Eagle Ford.
This is the best way to get information on your particular area. Also check out some of the other discussions at the top such as Mineral Help. You can learn a lot by exploring these forums and asking questions of people experienced in your area. Good Luck