No problem!
The UEFI has been awful, as there is no option to disable it. They didn't
even include Legacy BIOS :(. It's awful.
It is a huge amount of dependencies to scrap together, so all I can think of
is to use a router or physical firewall (Raspberry Pi (not completely FOSS
last time I checked), or BeagleBone Black would work as a small physical
firewall. You could edit iptables manually, but it's a real pain.
I actually am using Mint on my laptop and Debian on my desktop, but I'm
switching the laptop to Trisquel when I have a chance to transfer everything.
It definitely is a nice distro for beginners, but it is filled with codecs
and flash on my version. Debian is really nice, as it has taught me a lot
about Linux, and has a deblobbed kernel. I know that it isn't FSF/GNU
approved yet due to the nonfree branch, but if you disable it, it makes a
nice system.
OpenBSD looks like fun XD, but it is a shame that the community was so
hostile to a project that tried to bring OpenBSD to regular users.