If you want to change your life then train with purpose. Dont workout just for the sake of it. 

Chase those physical goals you have set for yourself and see how your physique and self confidence changes. 

Every time you catch yourself going into negative loop. Say 54321 break the pattern repeat your goal to yourself and say that you are obsessed about it. Thats how you rewire your brain. 

Major part of changing your life is to educate yourself. Read books, take courses and higher coaches. 

Start teaching others what you have learned to understand better. 

Create content around your natural curiosities, passion and interest. 

Do this for 6+ months and you will have your knowledge turned into a digital asset.