This is ideally how QA should be run at most organizations. Help familiarize juniors with tooling like git, the command line, deploying things, writing tickets,

This is ideally how QA should be run at most organizations. Help familiarize juniors with tooling like git, the command line, deploying things, writing tickets, communicating with the team-- have them see different parts of the engineering organization and then let them choose where they think they have the most interest. I know because I've done this with wild success and everywhere that doesn't do this has had by comparison awful QA.