You can't do a SOG in that size space with one light. So that's out.
SCROG's are decent, but for a first grow I would just focus on keeping them happy and healthy and grow them straight up.
To answer you questions re: what a scrog is....
http://www.lmgtfy.com/?q=SCROG
It can be difficult to manage, makes trimming more difficult and will help to promote mold if airflow is poor. For your very first grow I think it's best to just grow'em. Play around with all of the techniques after you've done a straight up grow so you can determine if you see improvements when trying certain things out.
I still like to use "straight up" as my main growing technique. Infortunately sometimes plants get unruly and will need to be topped or supercropped to keep height down or to adjust some "timing" between my two grow rooms, but I like big ass cola's and they just don't happen if you SCROG, Top, LST, or pretty much anything else that can be done. My yields are slightly lower when I avoid the techniques, but my enjoyment of growing is WAY up when I grow them straight up.