Help please with IT set up for remote training


Hi, I wonder if anyone can give advice please? I provide training in the use of Sage accounts and payroll.
I’ve been asked to provide some remote training and not sure what equipment or systems I’d need to do this.
I think there is something called Zoho which is free to use software…guessing I just need to sign up to this?
Thinking headset? Do I need a landline or is it all done through internet/laptop? Is there anything else I’d need to do?
All help gracefully received. I’m fine using IT but just not a clue on setting up…:blush: