Im new to the board as well and fairly new to Linux.
Are you looking for a good OS to start with? I think a person cant go wrong with Ubuntu but it really depends on you and what your needs are. Mine are classroom and labs, so I use about 6 different distros.
Kali has been the funnest (pen-testing)
Ubuntu is the go-to
I like how clean OpenSUSE is (seems to be a good desktop, but doesn't use a lot of the traditional linux language)
CentOS I have but haven't really used to much, seems similar to OpenSuse as far as how clean it is
Gentoo was a pain to install
Slackware I have but have done very little with, it seems to have features others do not such as LILO for the MBR (not Grub/grub2)
Have fun I say, burn a bunch of images, take a single classroom exercise and try to make it happen on all OS's, if it fails, no biggie either roll back to a previous snapshot or install it again (good practice).