Ch.22
The different platforms work together, they communicate and evolve together.
It's more than fine to play around in the different platforms. It's actually a liberating thing, to not be locked to one platform as we were before.
Having all these options might sound complex, but using Fediverse community social is not like choosing a corporate social media platform. Your friends messages and communication spread across the community of platforms in the Fedi. It's not choosing 1 platform over another or getting stuck.
This site is a nice overview for some of the different Fedi platforms and what they do in co-operation, which corporate sites do apart.