You don’t need a perfect plan. You need a first step small enough that you can’t argue with it.

A plan is not what gets you moving; a first step is. Planning can continue indefinitely, and the better it gets the more reasons you have to keep refining instead of beginning, because refining is comfortable and beginning is not. A step small enough to be unarguable walks straight past that whole debate. Once you are moving, the plan improves on contact with the real thing anyway.

Shrink your next step until it is almost embarrassing. Open the book, write one sentence, send the one-line message. Do it within the hour and see what the task actually looks like from inside.