I'm fairly new to the society myself. What I did was figure out what I wanted to do. Then looked at the races. Since you want big half orc, that part is solved. Now what do you want to do? I'm guessing bash something meaty and make it paste. In the half orc pages you saw your yellowish box, gave you your Stat plus and minus, all your racial traits, bonus feats, skills, languages. Read thru the skills and feats, see what you like and start to build a progression tree, maybe look at other classes to see will balance you out to get your end goal.
Hope this helped, that is how I started my warpriest, that gets to start January 7th.