I think your getting excited and jumping ahead of yourself. You have plenty of time. Find the tank you want, then figure out how you want to set it up.
Your enthusiasm is great, I get it. Love to see new passion enter the hobby. But there is a lot to figure out before you just right to buying the fish you want. I’m just gonna list a couple and I hope their helpful to you. My best advice is take it slow and enjoy the process.
After you get your tank there is a few things you will want to consider. Filtration, heating, extra water flow, substrate, decor, lighting, backgrounds. For instance, have you looked into bare bottom tanks vs gravel or sand tanks? Maybe you like more natural sand and leaf litter?
Do you want plants? Or just some rocks and driftwood, or maybe a castle and spongebob house. Many many options, BUT figuring them out is easily half the fun. Do you like the look of bubble wands vs Powerheads? Or will you overfilter and not use either?
Find your tank, figure your equipment out. Find a scape you like, google cichlid aquarium scape, or use the search feature on this forum and look at other members tanks. You may find out that what you want right now, isn’t actually what you want. I’ve had single fish tanks and I’m not gonna lie when their smaller it is tough, sure when you have one big beautiful fish it looks great, but when you have to sit through a year of hardly seeing your fish because its 3 inches and hides it gets hard.
I don’t recommend cycling with your cichlid you’ve chosen “in tank” leave that to a mollie or two if you so choose to go the “fish in tank” route. And on that note, research the aquarium cycle. You’ll have time during the cycling process to narrow down exactly what you want.
And lastly because I don’t want to make you read a book for a response. Do you know what “Texas” cichlid you actually want?
Herichthys cyanoguttatus
Or
Herichthys Carpintis?
Learn alittle about their scientific names, it’s a pain in the ass. But it will greatly help you actually be able to tell the difference between the many fish that share common names. And above all, welcome to the hobby may it be life long.