First off, I can see yo uare using Ubuntu. Thats great. Makes things a littel easier.
Here are two sites I have found very useful:
The first site is a resource for doing (almost) everything with Ubuntu
The second is the Ubuntu wiki. People submit howtos and stuff here for your perusal. Try these two pages as part of your search for "how to do x"
The other resource i would use is the Ubuntu-specific forum here at Linux questions.
There are quite a few people who use Ubuntu, and a few of them regularly post in that forum. While you may not get immediate answers, you [should] get pointed in the right direction.
Lastly, before leaving, I will leave you with teh often said:
Google is your friend - this is no lie. If you are unsure, ask google, he might be able to find it for you!