Texas has 4 venomous snakes—rattlesnakes, cottonmouths (aka water moccasins), copperheads and coral snakes. Identifying photos are here: https://tpwd.texas.gov/education/kids/wild-things/wildlife/texas-poisonous-venomous-snakes
Other snakes are beneficial, eating rodents.
To identify local snakes, look for a handy laminated brochure at the HEB checkout. Or, get this from Amazon: Snakes of Central Texas $7.95Photo by resident, K. Lippy
A list of local snake wranglers that will safely relocate these animals is coming soon.