Need career/major advice

Hello, I’m a senior in high school and I’m really unsure of what career/major I want to go down. I’ve always wanted to help people, like save lives help, whether that be physically and/or mentally. I assume the medical field is the place to look but if there is a job outside the med field I’d gladly do it. However, my dad passed when I was 13 (bear with me now), and I’ve always wanted to do something to honor him. So I thought I’d start my own institution in his name. So I want to go into private practice with my own place. Any recommendations would be helpful. Thanks.