I use AltStore for uYou+ and find it pretty easy & convenient. It requires some maintenance because you have to connect to iTunes and refresh AltStore + any side loaded apps every 7 days, but it’s easy to reinstall if you forget to do that. It does have you login using your Apple ID, but you can always create a separate account if that worries you.

GitHub: https://github.com/altstoreio/AltStore Website: https://altstore.io