First grow your outreach. Invite friends and family to join your group and grow to 500+ members. Then, try getting in touch with experts in your city/country. Invite them over for a casual discussion virtually. Share engaging posts related to latest news, job updates and projects going on in this space. Invite enthusiasts to share their stories and their interests as well. It takes some time and will require quite a lot of efforts from your end initially, but eventually, the community will kick off and become self-sustaining.