audio and video help

[MN9]

My question/problem is about teaching Flamenco dance classes online from home:

Is anybody experiencing problems teaching online classes with zoom? I have been working with my 12 year old Dell laptop for over 3 years now and never had a problem with audio or video! Now I have a new HP Elitebook convertible laptop and nothing works anymore, when I stand 3 meters away from my device my students can hardly hear me or the music I play via bluetooth from my stereo equipment and much less when I do  footwork, being a big part of Flamenco dancing. I have been with an IT specialist for many hours trying out all the options with the adjustments of the zoom tools (audio and camera) and NO LUCK! And the video also is showing me going in the wrong direction whether it is in mirrored mode or not mirrored mode. Any help, comments or sharing your experience is much appreciated. Thank you!