Starting is half the job. Why? Because you’ve shifted from state of rest to state of motion. That requires a lot of effort.
Now once you’re in motion, next is to stay in motion & not drop it. Staying in motion is easier than getting into motion. So you’ve already done the hard part.
Now the other half of the job is to not stop until done.
These 2 together, starting & not stopping make up 100% of the job.