A quick google search says you are wrong:
https://www.concealedcarry-ed.com/texas/concealedcarry_law/
Texas Concealed Carry Laws
Texas License to Carry Permit Requirements
Applicant Requirements:
You must be 21 years of age or older to apply for a Texas License to Carry (LTC).
You must have a valid government-issued identification card, such as driver's license from Texas or another state.
You must meet all qualifications to purchase a handgun.
You must pass an approved classroom or online training course and demonstrate handgun proficiency shooting with a Texas-qualified LTC instructor.
Document Requirements:
Documentation showing successful completion of an approved gun safety class or training program*.
Your completed application (LTC-78A) for the Texas License to Carry a handgun and any other supporting documents.
Note: In addition to the above requirements, out-of-state applicants must also submit a copy of their state driver's license or identification card, along with the LTC-6 form. Applicants who are born out of the United States must provide, in addition to the completed application, documents to support their legal status, such as Certificate of Naturalization, Permanent Resident Card, etc.