Welcome, Mommycurl! I also started here with flat iron damage. Right now, moisture will be key for you. It seems like you're off to a good start. It will take a little time to reverse the damage but it will happen. If you're still feeling dry, you may want to do a deep treatment. As your hair gets healthier, your needs may change but cross one bridge at a time.
If what you are doing is working, then stick with it. If you feel build-up, go ahead and use a gentle shampoo. The co-wash alone doesn't work for all of us.
Read as much as you can and learn as much as you can. The biggest mistake I made when I started was to try too much at once. I wanted to try every product and technique I read! I had to restrain myself to one step at a time!
3B, fine, normal to low porosity
Modified CG since June 2010
HGs: FSG, anything with glycerin, Tresemme Naturals conditioner, Curls Like Us cloths, satin pillowcases.