Congratulations on the new ride. Getting a new bike is pretty exciting. That bike will serve you well. As for the Zwift kick in the butt, don't worry about it. Get your sea legs under you first:
- Ride it around the neighborhood... a couple miles today. Your butt will hurt tomorrow, but do it again anyway.
- Take it to a shop that does fittings and get it dialed in. You can tolerate a terrible fit for a couple miles, or a slightly bad fit for ten to twenty miles. But you deserve to have a good fit from the start or you'll be risking damage to your knees and to your love of the sport.
- Once you're ok with a couple miles around the neighborhood start going for 5 miles, then 10, then 15, 20... most days.
- Zwift when the weather doesn't promote enjoyable riding.
Pretty bike. Seems like a fairly relaxed geometry. Have fun.