Start here
habits
Change one thing, until it holds. Then the next.
One small thing you could do
Pick the ONE habit that would make the others easier, and formally excuse yourself from the rest of the list — write the others down on a "later, in order" page so your brain believes they're queued, not abandoned. Then do today's smallest version of the one.
Bring in a single change, two at the very most — never a whole system. Once it runs without thought, it stopped costing willpower, and the next one can start.