Better get RG 58U instead of RG 59U. 58 is a 52 ohm cable where 59 - if I remember correctly is 75 ohm.
Just to listen it should not make much difference, but if you plan on using coax as a transmission line from your radio to the antenna, you will probably find your radio has a spec to match to 52 ohm cable.
A mismatch will lead to a very high SWR (standing wave ratio) and a dramatic decrease in the RF power delivered to the antenna, although at low CB power the chances of frying your radio should be minimal. Do not try to amplify power output if you have a mismatch from your radio to the transmission line.
Read through the Amateur Radio Handbook in the chapters on transmission lines for a more detailed explanation,

Oh, and you can get an amateur license without need for morse code knowledge these days (much to my dislike, but that is another thread.)

Find some 144 MHZ gear ( 2 meter band) for a start. Most of the 2 meter radios have WX capability ( that is weather info to non- hams) and many of them also have very high frequency and ultra high frequency capability as well, so you can evesedrop on the drive thru at the Golden Arch Room as well as other nifty things.

But = For SWL (short wave listning) on the lower bands I do not think the receiver portion of most 2 meter rigs will work. You still should get a General Coverage rcvr (probably will not have 2 meter capability though) and run it from an independent antenna.

Look up Amateur Radio clubs in your area. They will be most welcoming and probably also run classes for rookies looking for their first license! Trust me - they will be glad to see you!

All the best

Mark