Then you would be Indian, not Spanish.
Mestizo, if you want to be very exact, rather than PC-like most whose ancestors came from Spain in the 1700’s-Native American + Spanish makes Mestizo. But what is in a label-all are called Hispanic or Latino anyway, unless they insist otherwise.
And pardon me-that should be “The United States of America”, not just America-strictly speaking, the US of A at that time was the thirteen colonies-what is now Texas, New Mexico, Arizona, etc was Spanish territory, or New Spain. My ancestors lived and ranched in what is now Texas...
And, pardon again-”in the 1700s” should be “before the 1700’s”-they were already in Mexico by the 1700’s, and came to what is now south and west Texas...
Why? Spaniards got here in the 1500s. The USA didn’t come along until 1776.