New to voting – is the 2025 November Texas election important?

I saw on instagram there is an election in november in texas. I thought the midterms were in 2026, what is this? Should I vote? I live in Harris County.

When I look on the

https://teamrv-mvp.sos.texas.gov website it says

11/04/2025–2025 NOVEMBER 4TH CONSTITUTIONAL AMENDMENT

for upcoming election, but when I click it, it doesn't show any polling places for early or election day poll places. Does that mean it's not for me to vote?

thanks