Online Vocal Coaching sessions can be very effective for people who are overseas or unable to travel. I currently work online with vocalists living in Australia, France, working on Cruise ships and more.
I use the free video conferencing platform Zoom. It is extremely reliable with almost no noticeable time delay! You will need to create a Zoom account prior to your session, but thankfully this is quick, easy and free.
Online sessions run a little differently than working in person. During the session you will control most of the audio from your end, so I recommend that you have a look on YouTube, Spotify or other streaming services for karaoke tracks, or of course accompany yourself.
My clients often feedback that they enjoy working online as it gives them more control over their learning without having to leave their home, as well as the instant visual feedback they gain from having a camera in front of them.