Embarrassing but true

So I really wish my parents had told me straight out I was adopted, but I think they thought I'd just figure it out. Which is what happened, but it took a while. I'm a Hispanic female and my adopted family is white. We lived in a state that had pretty much a 95% white population. Going to school my race never came up. No one at school ever said anything and I never thought about it. Instead I'd think about that fact I could get away with not wearing sunscreen and not burn unlike my mom and sister, but I never truly thought about it. Then when I was 10 we moved to Texas. For a few years I think it all started to click in my head. I will honestly (and embarrassingly) say that I didn't even KNOW I was Hispanic until I moved to Texas. :o So one night when I was 12 I just kind of started to mention how I didn't look the same as my parents and they finally told me. It was shocking and slightly horrible way to figure it out. After the shock wore off I went looking for answers. I asked my mom about it and she told me where, when, and very vaguely who. I remember she promised me to show me a picture or more information (I can't remember) but she never did and I could tell it was uncomfortable for her. So I knew then that I'd have to wait till I was an adult. I'm 19 now and I've decided to start my search seriously. Unfortunately my mom and I have fallen out recently and I don't feel comfortable asking my father (they're going through a divorce at the moment). So any help on how to get started would be appreciated! (why I'm here!) So for any adopted parents out there, tell your kids. It sucks for them to figure out on their own.