How does one start a new beginning?
One step at a time.
The greatest cause of worry is fear. Your first step in conquering fear is to learn not to be frightened of fear itself. It’s the change of things that scare us, not knowing what to expect. This is where you really need to be aware of yourself repeating the old pattern like it is brand new but in a different way.
The ego is very good at convincing us that we are on a new path, so embrace fear and realize that getting rid of it is the door to change.