I mean, this is an incredibly vague question since you haven’t really told us… anything. However, a few tips:

1. Focus on what you do want, rather than on what you don’t want. You want to be better? Great! Be better how? You want to have structure - okay, sure, but why? What goals are having more structure serving? Tell us what you want.
2. If you are lacking self control, the answer, almost universally, is other people. If your family is waiting at home for you to have dinner, you are less likely to eat taco bell. If you want to hit the gym, it helps to recruit a friend to work out witb you three days per week. Want to excell at work? Make friends with coworkers and ask for their help solving problems. Having trouble getting up in the morning? You’ll have less trouble if you have a job where everyone is counting on you to show up.
3. Don’t try to stop bad habits. Just let them fade away as your life fills up with better things. When you notice a bad habit that you want to quit, ask “what need is this fulfilling?” and then experiment with other ways to get that need met.

Beyond that, there are different systems for doing life admin, but I’m guessing you arent really at that place rn.