You may not be able to change the external circumstances, stressful situations, or work environment. What you can do is control how you react to negative forces and stressful situations.

For example: If you get unhealthy food at your home, you can control how or when ...

Once you've practiced the new behavior for six months, you're in the maintenance stage.

Shift your focus to integrate the change into your life and prevent relapse. It may require other changes, like avoiding situations or triggers associated with the old habit.

It's not the world, it will not make you socially invincible or everybody's friend. Yes, it may change how you approach social situations with others or help you overcome your social insecurities. That's okay - it helped me too. See it as a guide to be a pleasant person - to give you some insight...