You probably don’t need all of this. Good gear doesn’t make you a better instructor. First use the tools you already have in your toolbox and expand if you feel like you can improve in some area.
Some gear to make your virtual classroom experience a little better. Check out the workspace inspiration page and the resources page for more gear recommendations.
The camera on your iPhone or iPad is leagues ahead of any webcam on the market. You should try to use your iPhone wherever you can. There are tons of tools to use you smartphone camera as a webcam, like Camo, OBS camera or Iriun.
If you want to go even fancier and you have a DSLR camera you can also use that as a webcam. At CMD Amsterdam we have a few Elgato Cam Links. A cheap HDMI capture card from AliExpress also works wonders.
Transistor wrote a good guide on some of the entry level Microphones. tl;dr get an USB microphone when you are starting out. Upgrade to an XLR microphone with audio interface if you do a ton of screencasting.
Elgato also makes some good video’s about how to set-up all their gear and improve the quality of your webcam.