The gamecube version CAN be fun offline, it has a multiplayer split screen option so you can play with 4 people at once if you can't get online. And it has various little sidequests you can do.
Its quite easy for a noob to enter the online world in this game, provide they do a few things first:
Buy a keyboard.
Try finishing the game offline once, just so you can get some idea of what to expect in terms of gameplay. Also, your character's stats won't start at level 1 when you go online.
Just like in the real world, don't be a dick. Or you'll find yourself playing alone all the time.
Also, DONT LOBBY SPAM. If you really want to piss people off and play solo all the time, just make an annoying chat symbol with sound effects and keep using it over and over again.
Also, if you tell people you are a beginner, you will find plenty of people who are willing to help you out.