It IS possible to over-think issues to the point of having even worse outcomes than would have otherwise been the case. Sometimes I sense this is your greatest enemy. Perhaps the deceptively simple words of Theodore Roosevelt, the 26th US President, may be appropriate here. There is depth of wisdom in these short eleven words,

"Do what you can, with what you have, where you are."

Then just let everything else take care of itself. And surprisingly, it will...