I definitely advise you to Google Meeting. It is elementary to use and register. It transmits sound well and does not overload your computer. Plus, there are no time limits and limits of the participants' number. It is convenient to use it even from your phone. I use mine very often.
However, I recently accidentally lost it due to my absent-mindedness. But thanks to the service
freetring.com, which a friend advised me to found it quickly. It's good that the person who picked him up answered the call and reported his whereabouts.
You can also try Skype, but the current versions are not particularly optimized for PCs.