As others have said, you're in the right place, this group focuses on riding.
As for keeping up with local activity you can start with the info on the web site and forum, but there are a limited number of people on the site. If you have not already joined the MSTA (filled out a membership application) I strongly recommend doing that. You'll get the national newsletter, as well as your local (Texas) newsletter, and a membership book that will allow you to reach out to others in your area.
Texas does have an active group, and I suspect some of them will be along in the coming days to offer you more info on the local Texas activities.
If you have not joined the MSTA yet, but are considering it, I recommend finding an event you want to attend (STAR in Springdale AR June 21-24, Texas Hill Country Rally November I think) and joining at that time (many events offer a free one year membership with paid event attendance.