1. Listen (a lot) to speakers&#x2F;recordings of whatever accent you like<p>2. Read (a lot) of anything you find interesting<p>3. English grammar = memorization. We inherit grammar points from Old German, Old French, and Latin. The result is that native speakers mix and match grammar rules and it sounds weird when using a certain rule in a place where it logically should be OK.<p>It sounds like most of these problems can be solved with bulk exposure to the language. I know, easier said than done.<p>Also for the grammar, it would be good to have structured learning rather than just listening&#x2F;reading to random things. <a href="https:&#x2F;&#x2F;learnenglish.britishcouncil.org&#x2F;en&#x2F;english-grammar&#x2F;verbs&#x2F;double-object-verbs" rel="nofollow">https:&#x2F;&#x2F;learnenglish.britishcouncil.org&#x2F;en&#x2F;english-grammar&#x2F;v...</a> seems to be a decent resource, and British grammar is 99.99% same as American.