Sounds good. I remember a few years ago I did a door on a 69 C10 pickup. The customer wanted only a lower half door skin. The new panel was not too great but we put it on anyways and the body line didn't fit right, etc. It needed quite a bit of filler (more than I liked on a vehicle) and I kept putting a coat on, sanding it smooth, another coat, sand it smooth, and did this over and over. The old guy I worked with came over and slabbed a big ass coat on it, hit it down with 36 on a long board, then 80 and finished it with 180 or whatever he used. After that I learned quick and started using more. It's easier to have more than you need and cut off what you dont need than to not have enough and waste more time. You may waste a little more materials (bondo, sandpaper) but you save time which equals more money in some cases.
As for the glaze, it's to fill any sand scratches, pin holes, small imperfections. When mixing filler do not whip it and mix with a stick. What I do (others may have a different method) is use the spreader and just smooth it out and keep putting it on top of eachother and smooth or pull it out like your actually spreading the filler. Hard to explain sorry.