If you are finding this blog late at night, I know exactly what advice you need--the 85% Rule. Stop fretting, worrying, googling the same keywords so many times you realize you have read everything on the Internet ever written about your problem.
Most of all, stop worrying about making decisions with 100% certainty!
Quiet your mind. Meditate, take a break. Read Zen Habits.
When you feel 85% confident about your decision, act on it.
Life is not about certainty. If you wait until you are ready, you will be dead. It will never happen. So stop letting the perfect be the enemy of the good, and let the good be good enough.
Let the synchronicity begin...