Don't Think. Just DO.
If you find that you tend to overthink situations, first create a basic plan.
Once you've created a plan, trust that you'll work out the details and just start taking the next step in your plan. Don't rework the plan or overthink what might or might not happen.
Take action and just do what's next.
And then take the next step...
Notice what happens when you're taking action
instead of spending time, energy and effort
on thinking and reworking your plan.