OK, if that got it working then don't worry about the outputs
(Basically "apt-get" is the command-line version of the software manager, so all it did was install updates.)
Sadly I don't know off-hand of any good Linux tutorials...I'm sure just googling around a bit will find you some!
I personally learned everything I know about Linux from installing Arch Linux. (It's a very bare-bones, build-it-yourself distribution...honestly if you have the time and the frustration level to deal with it I would say that's one of the best ways to REALLY learn Linux...but once again you have to come at it from a learning standpoint and expect to get frustrated at points or it'll turn you off of Linux REAL quick! lol ;) )
Also I don't know how set you are about using Kubuntu as your distro of choice. If so that's great; it's an excellent first-time distribution! But if you'd at all be willing to look into it, I think Linux Mint is the best beginners/everyday user's distro. It's based off of Ubuntu, but (IMO) has done alot of things much better!
(They also have a KDE version if you don't like Gnome...although their new window manager, "Cinnamon", for Gnome is VERY nice!
) Linux Mint is definitely my favorite distro!
If you have any more questions or want clarifications on anything or whatever, just let me know! I'm more than happy to help!
Also welcome to the world of Linux...there may be some hiccups along the way, but in the end you'll be glad you joined! ;)
P.S. I hope to be an airplane pilot someday...not airliners or anything, just single engine, or maybe small twin-engines