Yes you can do an enormous amount of things with the array function.
It may be time for you to really practice the LaTex that you have already acquired for a while before you try too hard to add to it. You have learned an enormous amount in a very short space of time. 
Have a look through the LaTex thread or just look at mine and Heureka's answers if you want to add more to your knowledge base.
Also there are the automated functions that admin added in the first place - like colours, italics, bold and others. Have a look at what is easily available to you in the LaTex ribbon.