LOL. Looks like everyone wants to get "streaming" to be easy.
By the way, I just purchased this little box. A portable video mixer, also contains an audio mixer inside. My application is primarily mixing external video signals + document camera + computer screen for Zoom sessions and livestream of lectures.
A (slightly) more complex set up than most people need, but an interesting audio/video solution nonetheless.
https://www.blackmagicdesign.com/products/atemmini