Am I a racist person for trying to celebrate my culture

Well since it has been proven to cause cancer and UV damage is responsible for 90% of aging signs (not even exaggerating) I would suggest a quality spray tan that you test on a small area to make sure you don't turn orange. And probably applied by a professional too.

Well technically you probably are white with predominantly European heritage

That doesn't make you any less Hispanic, Hispanic isn't a race it's a culture. There are white Hispanics, you are one of them, as well as black Hispanics and mixed Hispanics etc.

Latin America is the most racially diverse region on the planet. America (as in "US of A" America) is just stupid and makes "Speaking Spanish" a race, and it's the ONLY country that does that.

Don't feel like you have to tan or change your appearance in order to look "more Hispanic". There is no one way for Hispanics to look, you know your heritage and that is what matters.