database error

[flnz400]

I'm a newbie, and apparently while trying to learn how to 'addon' domains and mysql databases in my cpanel, I screwed my up VBulletin software. My homepage won't even load. it just says database error.

Through searching on here and other support forums, I tried all the suggestions from all the threads: password reset, removal of all trace files from addons, wordpress, etc... I added a couple domains and was trying to install wordpress on one of them, just to learn how. I think that's what did it.

I've contacted my host, and they said it looks like I overtaxed the mysql, which usually calls for a full reinstall they said. Mind you, they installed VB for me the first time as a courtesy, so I have no clue about that. More importantly, they mentioned I should be able to back up my parent and child forums plus my content and skin mods.

I searched and I'm confused on the best way to do this. It would seem obvious to me to do a download in the ACP if I could get into it. Any help would be greatly appreciated!

Thanks in advance!

P.S. I have no computer knowledge...for future references, would it be better to have separate hosting accounts for domains to learn with? Thanks!