Where is my life going?

I don't know what I'm doing with my life. I see all the people i went to high school having kids, getting married, some transferring colleges. I see people on social media i follow traveling, moving out, doing all these great things with their life. I feel like my life is just a waste. I've been so depressed that i feel like that has hold me back. I don't even know what i want to study. I've always loved styling hair. Ever since i was little I've said i wanted to become a cosmetologist. My dad has always been against it, he says thats not good a job. Ive also always loved the idea of teachig. I do love kids. And i would love to help kids with special needs. I love both, but I can't choose what i want to do. Can i do both?