I really really need help. to do my homework from school, since two days ago, I was installing oracle 11g on my ubuntu.

through that process, there was lots of problems also, but searching a lot, in somehow I could go to the next phase installing it. (because it was the first time to install on ubuntu by myself..) but when I was making password for oracle and clicked next, it says there are not enough space for home/oracle folder, So to make another space, I mounted another space after checking Gparted and using Software device management, I mounted it. And when I rebooted it,

since then, I cannot log in to my own administrator account and even to oracle account(that I made for oracle 11g on ubuntu ) when I type the passwords for it, it seems to work but it redisplay the first page to log in, without really logging in it..

So I loggined to here as guest account...

and even I cannot try gnome console manipulation to restore or fix it.. because it is guest account...

I`m struggling for three days and... help me, how do I need to do? and at the time oracle said it needs enough space for its home folder, how I should have done?