Put a copy of the file (that you want to use as virtual background) on your computer. Remember the location. To make it easy to find, put the file in your computer's Desktop or Downloads.
You can download this file for the 2022 Evangelization Rally (E-Rally).
Go to your Zoom session.
Click the up arrow to the right of the video camera icon.
This shows a selection list.
Click Choose Virtual Background...
Click Background & Filters option (at the left side).
You may see some Virtual Background options already.
To add another virtual background, click the plus sign (at the right side).
Click Add Image (at the right side) to upload your virtual background.
If ever you want to NOT use a virtual background, click the None option.
Upload the file for your virtual background.
Click the background file that you want to make it your virtual background.
Find the right position/angle in front of your camera so that you do not "disappear" into the background.