don't be intimidated by terminal, if you are trying to do anything serious you are probably following instructions in a guide, which probably just gives you code to copy and paste. Theres only a couple commands you need to know:
cd moves you to the folder you specify, just open up the folder you want to go to and click the button to the left of the folder location to change it to a text output that you can just paste after cd.
sh runs that file (needed for ATI propriety drivers for example)
also, any code that returns an error saying that you don't have the permissions to run something add "sudo" to the beginning. Unlike 99% of things asking for a password, it doesn't actually show you inputing anything, but it does keep track of it so just insert your PW and hit enter
But for the most part, Ubuntu is self explanitory