Nice! I started vibe-coding too. I'm hoping to make some useful, privacy-focusded replacements of everyday productivity apps that strip out the centralized services amd data collection. I'm using Pear stack with holepunching for p2p connections. Got my first one in a working state today!
Check if you ever have a need for shared calendars (amongst friend and family), then check out PearCal (on Zapstore now):
https://zapstore.dev/apps/naddr1qq9kxmmd9ecx2ctjvdskcq3q6u9hy2m8w6xt7836cam7yyrmh3z849mg3xd4fzlkjnm352nt2tuqxpqqqplqkpllgcv