There are several different approaches, including NIP 17 DMs which exist in several clients, relay-based groups (see chachi.chat and groups.nip29.com), relays-as-groups (see flotilla.social), and nostr-over-MLS for nuclear grade privacy (see whitenoise: https://github.com/parres-hq/whitenoise). I'm working on flotilla and would be happy to help you set something up if you're looking to do that.
Discussion
Many thanks for this elaboration, appreciate that. At this point just wanted to better understand, I’ll def reach out later if needed 🙏🏻🙏🏻
And I’m browsing the website now, loving it!