I could start living life tomorrow but I choose not to- why?

I don’t understand what’s wrong with me. I could literally get up tomorrow and start eating right, workout, sell all my gaming stuff, and start gaining skills to get a new career. I could literally improve my life in every way right now. I choose not to. Why? It seems like such an incredibly easy thing to do but I just simply won’t. How do I rewire my brain to push me in the right direction?