The first step

“Worrying is like paying a debt you don't owe.”

The graphic below is known as the Stoic Happiness Triangle:

The focus is where the red arrows begin, what precedes good judgement and virtue is focusing on what you can control.

You must not look to either direction during your strides, you are a horse equipped with blinders.

This is an acquired skill with compound effects.

Just remember where to start:

Worry less.