I had to call my son anyway, so I asked him his advice. He is a lwayer in Norfolk, Va.
He said do a search - he recommended JUSTIA:
https://www.justia.com/lawyers/probate/texas/harris-county
He said snoop around on the attorneys websites and see if anyone seems to strike a cord. Then call them. He also said the first 15 minutes are generally free.
Best of luck. I hope all is well!