My main focus in tutoring is, and has always been vocabulary and pronunciation, since, having lived and worked in Costa Rica since 1961, and having brought 4 offspring into the world, I am aware of the fact that these are the most obvious red flags identifying non-native speakers. My English pronunciation is "General American" and I have little or no identifiable regional accent. I think I could be of great assistance to you and your goal. We can communicate by SKYPE to save some money in telephone expenses.