Motivation
Getting started can be hard without meaning you lack character. COM-B treats motivation as one part of a behavior, beside capability and opportunity. A one-minute start is a way to practice, not a test of willpower.
Example
Do only the first minute of a task you keep postponing.
Small action
Do the first minute, then stop.
COM-B barrier
Motivation. Motivation: the task feels larger than the reason to begin.