Download zoom app on your phone or go to http://zoom.us
Click “join a meeting
If you stay signed into Zoom, the Zoom app will sit on your desktop like picture below and all you will need to do is click join button and sign in with ID number for meetings. You can set your audio to automatically select audio by computer by clicking on settings button at top right of Zoom box and click on Audio.
When you enter the Zoom meeting especially the first time look for a note that says select Audio by Device so you will have sound and speaking abilities with your mic.