I often think back to a scene in BoJack Horseman, when he starts jogging and collapses at the top of a hill. A veteran runner sees him and says:

"It gets easier. Every day it gets a little easier. But you gotta do it every day — that’s the hard part. But it does get easier".

The gym, self-care, flossing.The list goes on, but that scene really clicked for me.