rushing

If you're 21, trying to rush, and you're not close to graduating... I doubt it man. You might be able to talk to some of the smaller houses but it's kinda iffy. If you're a freshman at 21 then it's definitely gonna be difficult. Just a heads up

I feel like a broken record player, but its a fraternity in Texas, not a frat

It's definitely possible, but you really should go out to rush events and meet members, not hide away and ask for answers on this website.

Fraternity life is better than not being in one.
Be open to any and all the houses at first, since you are older and will have a harder time getting a bid.

Lastly, have a good reason for why it took you so long to "see the light " and try to join