To generalise and confirm the other posters' answers - build yourself structure, and scale up gradually. Set small, visible, non-negotiable targets. It takes 10

To generalise and confirm the other posters' answers - build yourself structure, and scale up gradually. Set small, visible, non-negotiable targets. It takes 10,000 hours to become deeply skilled at something - I try to keep that order of magnitude in mind when thinking about trying to make changes; we're all experts at living under our current way of life!