This is good place to start which should give you the results you want within 1 to 3 months depending on how much your vision needs to improve
You can relax in your discipline. the goal is not to ad tension. It is to enjoy it and choose a time in day which can vary from day to day.
Choose a moment when you are having a break or simply doing nothing in anture, for instance.
Be flexible and think of a rhythm you can easily maintain on the log term without major effort.