If Zoom was as easy as ABC, you could just find the steps anywhere — but it isn't. BTW, Mac and Windows computer audio are different as far as Zoom is concerned. The only thing that applies to everything is that audio out of an app (except iTunes or other native audio apps) must be 48kHz. Period.

You have to watch this 10 minute video.

https://www.youtube.com/watch?v=dMu3C3cpVLg

Which explains this free 75 page book download (you will reread page 28 a lot)

https://drive.google.com/file/d/1qGqDh52xFovVifgYtjBJnG_fS3xlY1_r/view

If you're not too familiar with Zoom, this is a good primer. 

https://zoom.us/rec/play/vpR8cruv_zk3TNydsgSDVqAsW47ufKqsgyIcrqAKmU-8BiRQZAekYuYQZOT3XBxQx5RghwIDKnk5lJCa?continueMode=true&_x_zm_rtaid=vRkXzKxqS5OQWxIGQmLtAw.1588296081868.e48d011efd445329423c03ead25b8d12&_x_zm_rhtaid=592

which will lead you to this page of help and support articles

https://support.zoom.us/hc/en-us/articles/209743263-Meeting-and-Webinar-Best-Practices-and-Resources?flash_digest=5cb16df6652dce73be2961c21a6bbbee4867eed9