Oh really, even when it says this:
The Congress, whenever two thirds of both Houses shall deem it necessary, shall propose Amendments to this Constitution, or, on the Application of the Legislatures of two thirds of the several States, shall call a Convention for proposing Amendments, which, in either Case, shall be valid to all Intents and Purposes, as Part of this Constitution, when ratified by the Legislatures of three fourths of the several States, or by Conventions in three fourths thereof,"
And please tell everyone what Amendment you'll get Texas to propose that will get 3/4 of all 50 states agreeing to? A fool errand.
"or, on the Application of the Legislatures of two thirds of the several States, shall call a Convention for proposing Amendments," From this point on it's all states and nothing to do with votes from congress. The founders were pretty smart guys so that was the whole point of the two methods. The second being if the people wanted to change the constitution congress could not stop them. The founders feared one day the government could become corrupt and would refuse to change the constitution per the will of the people. So they added article V convention of states. If a convention of states required permission from congress then that would still leave the final say with the government and that would not make much sense would it.
You don't have to take it from me. Check out
https://conventionofstates.com/
They have many Constitutional lawyers and scholars that can answer any questions.