The easiest way to join a meeting is to click on the long link which is sent to you in an email from the host.
This takes you to the Zoom website page and you are then asked if you want to join the meeting, you confirm and then wait for the host to accept you into the meeting.
The second easy way is to navigate to the zoom.us page and choose to join a meeting, then type in the meeting code, which is typically composed of numbers grouped in threes and fours.
Zoom can be used on many devices, PC with camera, laptop, i-pads and smartphones.
The simplest way on these last two is to install the zoom app, which makes for a quicker start.
There are video tutorials on the zoom page and on youtube.
Hope to see you soon.