I don't think you should feel pressured to do anything you don't want to do -- being PoC does not change that.

With that being said, if you're people are by default Hispanic, it doesn't hurt to ask yourself why. There's the clear reason: you were raised in a Hispanic town. How would things change in your story if someone was a female instead of male? Another race instead of Hispanic? Had a disability? Had a mental illness? Was old instead of young? A 65-year-old Hispanic woman who suffers with depression after the war took her children and her leg is a very different person than a 13-year-old hot-tempered Indian boy who is blind, and despite what anyone says, these differences enhance the character, their struggles, and their stories. I'm not saying everything has to be extreme in every facet. Just something to chew over. If it doesn't work, don't make it. Go write your story.