I'm an aspiring geneticist, what do I do to get there?

As the title says, I want to become a geneticist one day! I'm currently in my last year of highschool with mostly -2 classes, knowing I'll have to upgrade many to -1 to get requirements for university.

What classes should I take in university once I reach the requirements?

I specifically want to research genetic disorders and help people with them live longer, more fulfilling lives where the symptoms are less severe or come later on. I don't want genetic disorders being a death sentence, but I still want people to have a choice in if they want to live longer and suffer less or handle their condition at the rate science and medicine says that they will naturally by the time I'm a geneticist.