You can also comment on some of the threads without pictures, and post something about your style and goals or body type if that's what you are interested in exploring here. That will put you ahead of the game when you start viewing and posting pictures.
The viewing requirement made many members more comfortable about posting privacy-wise because it helped determine that new members were real participants and not trolls, spammers or whatever. It also boosted membership as people had to join to see pics.
I'll just say that the more you give the more you'll get here, so take this opportunity to read as much as you can of Angie's posts especially!