Definitely don't give up, it'll be a great lesson when it's over and you'll have something to show for it. If you were several states over, I'd whip those drawers up on my box brake for ya. If you go with separate panels for the fronts, be sure to plan how/where they will attach and leave room for material, ie the front may be flat and attach from the rear or front may have side/bottom bent back and riveted/welded to drawer sides/bottom, then have the top bent forward in a 45* or two 90*s for a pull. It would have been much easier to make the drawers first as mentioned, but not too late to work with what you have. Keep it up! 
