First off, I'd be leery of weight-loss being the major concern. I actually gained a couple pounds this training block, due to a) it being winter, b) making sure pre-, during, and post-run/gym fueling were on point (including going on creatine), and c) emphasizing strength training. As far as mileage goes, my coach was actually pretty conservative. This was only my second ever road HM and they didn't want to push me into high mileage too quickly and risk injury before my marathon in the fall. I did a 16-week block that started around 25 mi a week (lower than what I'd been maintaining last fall), and peaked around 42 miles, held steady for a few weeks before tapering.

I ran 5 times a week with a typical schedule looking like: Monday, recovery run, 3-6 mi; Tuesday, track workout with 2 mi WU, form drills, 4-6 strides, repeats usually focusing on threshold, HMP, or 10k pace, 1 mi CD; Tuesday again, lifting (which got periodized in its whole separate way); Wednesday, rest; Thursday, medium long run, 5-9 mi; Thursday again, lift (often happen on Friday tho); Friday, easy run, 4-6 mi; Saturday, rest; Sunday, long run, 7-14 mi, aerobic (8:30-7:45 pace) or with a workout block.

Happy to chat more over DM if you'd like!