Real is best--with no distractions. Virtual is a poor substitute. Try to have a blank wall behind you. See the video above.
*If your goal is to insert a virtual background post-recording, use a solid and highly contrasting backdrop as a "green screen." This provides a uniform color to select and remove for the purpose of adding other creative touches and backgrounds.
Lighting should face you. It should not be behind you or to the sides of you. When test recording, be sure that odd shapes of light and reflections do not appear and adjust accordingly.
If you can be rid of glasses, go for it. The reflection of light can completely diminish that "connection" that is wanted with the audience. There's another consideration, too: Glasses can reflect the items in the room and have viewers squinting to figure out what pictures they see.
Keeping close to face and shoulders gives an intimate experience that mimics personal storytelling.
Whether you sit or stand, the camera should focus on your upper body--shoulders and face. Gestures that are made with your body are carried through your facial muscles. Nothing is lost. But, you don't have to have your body in the frame and doing so can be a serious distraction, as can hands.
If showing your hands is absolutely necessary, keep them at your sides, or, when raised, close to your shoulders. Moving them forward enlarges, shrinks, or blurs them and can be distracting and unsettling.
The rule of thumb for teachers and professionals holds that jewelry should be kept to a minimum and clothing should be modest and muted. In other words, don't let your attire pull attention away from you, unless there is a significant reason such as being a clown or character actor where such things play an actual role.
Practice with different microphones if you are able to. It's good to have a usb digital microphone. They are available at a full range of prices, and you can certainly explore the internet for additional information. Or contact me, and I can help. Personally, I use a Blue Snowball. It's relatively inexpensive and does an adequate job for me.