Agree. Experience shows that fluency arises when you don't have to think about rules anymore. My advice is to not spend too much time learning grammar rules (actually, no time, like native learners). Leave the rule discovery to your unconscious brain and get going with rote repetition.
Your brains "language module" is not a slow computer, computing rules, it's a fast lookup-table.
Your brains "language module" is not a slow computer, computing rules, it's a fast lookup-table.