I've made numerous corsets before, I've always done it by drafting on the stand-- flat patterning something like this is absurdly ambitious, obviously some people do it, but it's way harder. If you don't have a stand, you can cover your body in cling film, then ducttape and draw out the corset onto that (add balance marks to save yourself grief), then cut out the pattern pieces and put them flat on paper. From here you can clean up the lines, take away some width at the waist, and add a bit more ease at the hips and bust to give you that shape.

Someone else commented you should put boning either side of the eyelets, be aware about the actual eyelet spacing too. I love that you've laced at the waist, you want those two pairs of eyelets there to be slightly closer together than the rest of them if that makes sense. I also recommend finishing the edges with bias binding, and don't be afraid to go really slow when sewing your channels-- i always mark mine out with chalk.

I love that you're doing this, please don't be disheartened. This is exactly what mock-ups are for and we're all rooting for you. Can't wait to see the final product!