That is quite a project. Keep at it.
For non-flat panels, try using a crowned body hammer and a sand bag as the support. Take a small ( 1' square +/-) piece of scrap and just practice beating it on the sand bag, and seeing what comes up. After you do that, you might get a feel for what shapes you can hammer. Realize that as you beat the steel, it gets thinner, which means that the same metal must now occupy more space, so it curves.
For straight bends, a brake is the proper tool. Harbor Freight has a little one that might be all you need. Or, you could use a 2X4 and clamp the metal to it, and fold it over to whatever angle you need.
Keep posting pictures. They help me appreciate my rust-free car, and I'm down in MD!

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags