What's the best way to learn how to speak Spanish?

I am triracial (African American ,Dominican,Puerto Rican)
and cannot speak a lick of spanish all of my older brothers can but none of my sisters or myself can, and I would like to learn… but I am 27 years old amd my dad say’s that I am too old to learn and that none of it will stick if I do try to learn. can some one help.