Give CRUMB a try, I’ve used it for learning basic circuit designs, and it does a pretty good job! I think a great start is trying to get a basic 555 timer going in it, based on publicly available electrical diagrams and descriptions. The analog oscilloscope feature is super fun to play with.

https://store.steampowered.com/app/2198800/CRUMB_Circuit_Simulator/

A quick scroll of his account on Bluesky ( https://bsky.app/profile/urlyman.mastodon.social.ap.brid.gy ) makes it pretty clear why his Discover sucks. The algorithm on Bluesky sorta works like a mirror, you get out what you put in. My feed is all art posts and wholesome memes because I follow artists, creators, and comic pages, so it sounds like he’s trained his algorithm to be full of political complaining and toxic people like him. He should probably look into the Mute Words feature and start blocking stuff he thinks is toxic!