@Mel very interesting idea! Yes, it is possible to pin topics. In fact, currently there are two pinned, and we have a topic-banner too:
Welcome to The Social Music Network! 👋 will remain pinned forever, I guess. We can play with the second topic pinned or the banner.
What about this: you create the topic, we make it a wiki topic so other can edit too, and when you are happy about it as a v0.9 we pin it?