Okay, clearly, words do not serve in your specific example, for whatever reason it doesn’t work for you, so let’s forget the word motivation for a second.
Let’s say you want to form a habit. Running. Whatever.
The only thing that matters is that you run every day. Forget the word ‘habit’ also. Your goal is to run every day.
Now, you can buy some shoes, keep them somewhere visible, and set a fixed time each day to run.
That’s it. Now, you can get some tracker, a calendar, whatever, and mark each day where you ran with an X. Did you run? X. Did you not run? No X.
Now, let’s introduce a new word, maybe the only one that’s useful here: excuses.
For every day where there’s no X, what’s the excuse? Is it a good one? Can you agree with it? Or not? Now, the goal is to minimize the days with no X and to only have them when the excuse seems acceptable to you.
Not sure if that framework’s any better, but it cuts out all the conversation, which, I guess in your case, could help.
At the end of the day, all of this is about action and doing things, none of which you can replace by reading, discussing, thinking, etc.