What can I do to achieve my dream as someone going into their senior year?

For context, I am already a CNA, have a GPA of 3.2, and scored a 19 on the ACT. (I know I’m not very smart).

My dream is to become an orthopaedic surgeon or an emergency medicine doctor. I know they are vastly different in practice and daily life. I haven’t figured out which one I want to try for yet.

I also don’t know what to do or what steps I can take for this dream to even become achievable. None of my family members have been to college and have no knowledge of how to go about it.

I just need to be told what to do or what I can do. Please help because I’m running out of time to make decisions