One full body pic is enough to show you aren't fat. If you say you're interested in fit / athletic guys on your profile, that should cut down on the messages from fat guys. You'll still get messages from fat guys. Ignore them and just reply to the ones you're interested in. I went through my divorce in 2012. I took a few months to recover before I started dating again. It turns out it's easy to meet people online when you're fit and you have your shit together in life.