I actually wanted to join the mastodon.design instance; however, its rules are quite strict—reportedly prohibiting tech-related content—and the Frutiger Aero content I primarily create is virtually inseparable from that element. Consequently, I settled for my second choice and joined the mastodon.art instance instead. I also noticed that this ".art" instance blocks bridged communication with BlueSky, though I was already planning to register for a separate BlueSky account anyway.