What you plan for is likely to become the object of your frustration. Only because plans become overly important to the mind (you) who creates them, and no plan, no matter how sophisticated, will ever resolve the quirky, unsophisticated ramblings of life unfolding as it does.
Make your plans, but never forget that the only important thing in life is life. That is the life you experience right now, and if that aligns with your “plans,” consider yourself lucky, and if it doesn’t, allow yourself to meander a new side-road full of adventure and surprise.
Nothing you do is important. Knowing what YOU are is. Sometimes, keeping your heart means losing your mind and all its preparations for what may or may not come.