I am a fresh male long time tennis player / beginner who is taking lessons from my friend right now. I'm currently struggling with most aspects about badmittion and I have a couple questions for you guys. 1. My friend always tells me, "Loosen my elbow" when ever I hit almost all my shots. I dont really understand what exactly my elbow should be doing while swinging underhand. 2. Whats the best way to learn the flight path of a shuttle? 3. The biggest current problem right now is whenever I get even a bit frustrated,I start to adapt back to playing motion for motion like tennis, which is only frustrates me even more. Is there a specific way I can just "unlearn" everything I learned while holding a tennis racket? Any general extra info is also appreciated.