Thanks for the question. You have already answered it. The promises you make in your head have no binding power and God does not take them as binding.
You can consider them intentions to please God, and that is all God needs to be pleased. He knows all about your compulsory nature and looks at you like a parent does a child.
Growing up in the Lord is a life long process and thank goodness we have a very patient God, because if we didn't, very few people would ever grow up.