I can see you are nervous. I know it is sometimes hard but it's hard to open the lungs and express your voice when you sit. It really disadvantages your voice it would be great if you tried it standing. The reason they move their arms around when they sing it can help with their nerves and help them relax.. Judith Durham was an amazing singer i have enjoyed her voice for years. I have not seen many singers except Judy Zuke sit down with me till dawn. Keep up the good work.