Do you have any English grammar advice?

Yes!  Use Grammar Girl!  Grammar Girl is super smart and can answer many (even all) of your questions.  This site is composed of searchable grammar episodes.  So for example, right now Grammar Girl has been writing about verb tense.  The current question is, “Should you write your novel in present tense?”  Within her answer, Grammar Girl writes advice, but she also speaks it.  You can listen to her podcast.  Not only does she take written comments and questions, but she also has recorded podcasts with students (or even adults) with English grammar questions.  And even though, grammar might be considered nerdy, Grammar Girl is not–look at how cute she is!