Every community is different but one thing is certain that all communities want to help members connect with and help each other. So while thinking about the space you want to create, think about what would help members express themselves and what's relevant to help community members get to their outcomes.
Channel ideas for communities on Slack, Discord, or Circle:
On Deck is where top talent comes together to connect, learn and explore opportunities. They have a cohort-based community approach to learning and have a bouquet of fellowships going to help professionals achieve their professional goals. Here's my set of learnings (so far) by being a part of On Deck's first cohort for Community Builders.
As interactions spread across tools and platforms, providing a community map will help members gain maximum value from the community.