Teaching in virtual classroom is different. Here are some proven practices to help you run a successful virtual classroom session.
Know your Audience
The more you know about your learners the more effective you are going to be at giving them just what they need, Define pre-requisites for your training, and if you have the tools and time to do so, verify they have been completed by your audience members.
With any new course, more even if you are a new instructor do a practice run of your presentation with at least more than one person. They do not have to sit thru all of the content. Definitely use all the tools and launch all your content and demonstrations, every page of it, at least once in the same order you will do in the classroom. This will build confidence for you.