wow, particularly harsh group this time. they can be hard on texans, especially the californians that moved to the front range a couple years ago and now call themselves locals. or worse yet, the boulder trustafarians. southern colorado folks tend to be more respectful since they know who floats the economy
the frio is great fun, but realize most of the folks here are more hardcore whitewater types
a few suggestions to take it to the next level if you are interested. read William Nealy's book "Kayak" for a start. see if you can meet somebody you can run the Guadalupe with down in New Braunsfels - a great river for the next step in class 2 water. size up who you paddle with to see if they are safe & trustworthy - someone you can count on for help if you need it
Looks like you may be in a sit-on-top (sorry if i am wrong here). to get on more serious water, class III, you will need an inflatable kayak or a hardboat with skirt. there may be a club in austin that you can hook up with to get a taste of that and see if you want to keep going. even better, if you have the funds, book a week long class at Nantaha kayak school noc.com) - then you can get some professional instruction and really see if this is for you.
have fun & be safe