Probably something like https://wikifreedia.xyz/ will be what you want, but it's still a bit too new to have any of the terms you're confused about reliably defined.

You could always just ask "what does _ mean?" and tag #asknostr and chances are someone will help you out.

It's also sometimes worth doing a serach of https://github.com/nostr-protocol/nips to see if you can find a reference, but that may be more technical than you're looking for.