Greetings Neighbor, welcome to the Forum !
I'm a little late with this, missed it somehow.
Basement, probably not a concern, there's just not that many of them in Texas. And if you just have a One Story, then the Load Bearing issue won't be that much of a problem.
Yea, you probably got some Roof Supports there, and you can slip a couple of 2x4/2x6 up in the Attic to hold things up, IF those Roof Supports are sitting on the wall you're working with.
Other than than, both issues seem pretty straight forward, good luck, and keep us updated !
Have a good Day !
S.W.
Houston, Tx.