Welcome to the Family Boomz..

A way of learning Linux is first of make sure you got lots of time and you don't have to hurry like finishing a project by a time schedule. Now what ever the function you want to do just try if you can't figure it out do a search on Google for what ever the function and include Ubuntu to the search terms. 99% of the time you come back here to the forum with the answers. Also you might want to get familiar with terminal.

Bash Commands.
http://ss64.com/bash/