Here's an easy first project for a new bitcoin dev: make a "server explorer" for the various types of servers in bitcoin
Electrum servers, lightning nodes, and bitcoin nodes are all common servers that wallets and exchanges interact with. Lightning explorers are already very common (e.g. https://mempool.space/lightning), and this electrum server explorer already exists: https://1209k.com/bitcoin-eye/ele.php?chain=btc
But it isn't very pretty, and I'm not aware of anything similar for exploring bitcoin nodes and their features. Someone should make one that is beautiful and fun!
