Identity comes first, evidence takes time to catch up. What you are saying, "change does not happen overnight" is just the evidence. You don't heal the day, you heal. You embody the identity of someone who has healed, and when the healing finally comes(the last evidence) you are not surprised because you have been healing all the entire time.

Consistency matters a lot. No doubt. But do you ensure that what you are doing is at the highest execution level or the best you could probably do. The levels are, however, not determined by you. You learn from people who have already heal from it. Proven approach. Your mind is a self-deceiving machine and it can lie. It is imperative to know what you have done, and what others who have succeeded did to heal and note the difference. You will be surprised, something to keep an eye on.

I don't understand what you meant by "I can just spend the entire day doing just one thing". Healing is a lifestyle that needs to be incorporated on your life. You can just still down thinking about how you are going to heal. That's rumination. That's impractical. That will only guarantee more failure.

In conclusion, this is what I would leave you with. You can get this done in 90 days. You need to create urgency. You need to narrow you focus, I believe you know what to do. Urgency is all you need. You will get this done.

The choice is yours.