Hi, @LTS —
I believe your situation can benefit from setting a Recurring Webinar at No Specific Time. It looks like this when you’re done:

Locate the Recording Webinar checkbox and check it. Then in the Recurrence drop down look for No Fixed Time. Then you can start and stop the webinar whenever you like, and as often as you like. You’ll need to delete it when you no longer need it.
There are a few things to consider with this approach. Registration (if used) is one-time, which gives access to all open sessions. And you’ll want to advise the attendees/registrants about the timing of your sessions – the Zoom email with the Join Link won’t know and can’t tell the registrants.
I’d suggest creating one and give it a try with a few friends or test subjects to work out all the details in advance.