There’s a F2P student/fan project game on Steam based on the show The Orville. You can fly and explore the entire ship, as well as take a shuttle out for a drive.

There are tons of rooms to check out, all the decks, you can customize your own crew member, there’s multiplayer, and there’s even the holodeck.

It’s totally free and it’s actually pretty cool, though there aren’t any real goals or anything. It’s just a fun little thing.