I can not help you as I don't have the time for even my own students in my classroom, but I can give you a suggestion. If you do speak with a native speaker and you ask them to always correct your grammar when you speak, it interrupts the whole communication process and becomes quite artificial and rather useless. If you are fortunate enough to have a partner to speak with (it doesn't have to be a native speaker), then record your conversation first, then go back and check the transcript or have someone look over the transcript.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.