The Zoom groups are online, so participants can be anywhere in the world. Meetup groups can be either Zoom groups or local groups that meet in a geographical location. You may start your own meetup group (how to form your group) or you may find a local group you want to join.
Meetup groups may already be formed in your area. This video is a well-done explanation of how to find a local Meetup group.
You get started creating your meetup at this link: https://secure.meetup.com/create/
The key words you can use are metaphysics, understanding death, there is no death, spirits, ghosts, induced after death communication, paranormal, consciousness, spiritual (although that gets lots of religious groups as well), afterlife, meditation, spiritual growth, mystics, death and dying, conscious dying, grief support, near-death experiences, death, and other such terms.