There's a lot of research out there already that the OP doesn't seem to be aware of.

For one very helpful example: the book, "Solving the Procrastination Puzzle". One of the best techniques to solving procrastination is "Just Get Started". It addresses a lot of the objections that the OP brings up because very simply the tasks we dread aren't often as bad as we think they will be. If we just get started, we often find the challenge even enjoyable. Here is ChatGPT-4's summary of the techniques in the book:

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