You will never figure “everything” out. You will never be able to make everything perfect before you start. Just make a decision and run with it. Figure it out as you go along.
You will never live the life you want by wandering aimlessly through hypothetical scenarios. I’ve tried it, it doesn’t work. I’ve also tried just doing something. That worked.
I implore you: find a quiet place in your mind, identify your desires free of caveats, and make a plan to move toward those desires. Don’t try to plan for all eventualities. That will just prevent action.