Great for IRL, but VTT require more finesse. I've found gauging feedback to be a great tool. I try to keep at least 2 players engaged after my descriptions; otherwise I've likely lost them in my droning. I use 2 as the ideal, because only 1 could mean that player has a particular interest in something, not the whole.. More than 2 is hard to determine with a VTT, since only 1 person can talk at a time.Watch your players. If they're interested, you're doing fine.
1.) Eye contact - Practice getting your eyes off the paper so that you're looking at players more often than at your notes.