This is a fact that is usually underestimated.
The real change when you train either your eyes or your body happens not only physically but on the mind and energy level as well.
This means that your being readapts itself to a new more healthy and energized state.
Change requires focus and energy and sometimes, your body/energy/mind tedn to resist change because you have little energy to invest in that process.
The goal is to take small steps which are fun, light and freeing and expand from there.
Think long term.
What is a training rhythm that you can easily maintain on the long term without major effort.