How do you start taking control of your mind?

I just feel like my mind is saying a lot of negative self talks or beliefs but I just really hate it because it makes me feel like worthless and useless. And I'm starting to believe the things that my mind tells me. No wonder why I'm not able to take actions and going against my comfort zone. I want to take my life serious and work on my goals instead of procrastinating and it feels like my mind just says don't do it it is not worth it.