Once you get the hang of it, please consider writing an #introductions toot and pin that to your profile.
I recommend @laura 's intro to Mastodon (link below). Tech savvy ppl may even like to glance over the ActivityPub W3C standard to grasp the full power.
I use Pixelfed as another ActivityPub services, a few more interesting ones exist.
The "unofficial" Information Retrieval Mastodon Instance.
Goal: Make idf.social a viable and valuable social space for anyone working in Information Retrieval and related scientific research.
Everyone welcome but expect some level of geekiness on the instance and federated timelines.