You can select a default zone from the list and even set the default zone. Out of the box, the default zone is FedoraWorkstation, which rejects unsolicited incoming packets from ports 1 to 1024 ...
Debian is the classic server Linux, but tends to be the second choice on desktop hardware. It'd be wrong to write off Debian ...
Whatever the case, a portable Linux installation on a flash drive can be used in place of a normal storage drive in your PC.
Forget the bare minimum: here's how much RAM you actually need to get the best performance out of your Linux system today.