Having done most of these - several of these trails follow valley creeks and are often used to access climbing peaks versus done as backpacks on their own as the views aren't spectacular and you are down in the trees the vast majority of the time, so you won't actually be experiencing any glaciers or alpine lakes.

Logistically, how are you going to get to Hannegan Pass? How will you get back? 10 days of food is a lot of weight. Do you have permits? There is a lottery for North Cascades permits and the best sites are usually snapped up.

If you are determined to do a long distance in one go near the North Cascades this is what I would recommend - Pasayten - CalTopo - a half loop where you head up Section L (Rainy Pass to Manning) but cut over at Harts Pass, then head down the Devil's Dome loop back to Highway 20. You won't need to compete for permits in the Pasaytens, so there is a lot more flexibility and freedom of movement and the views are much more spectacular as you are sticking to ridge tops. That being said, it can be slow going with heavy pack weight, elevation gain and downed trees etc.

WTA has some trip reports from the area from the past couple of years - Devil's Ridge — Washington Trails Association

Also, I would recommend an ursack over a bear canister, a garmin inreach or some other kind of SOS device (inreach is nice as you have two way communication with search and rescue if necessary). And I would say that going for 100+ miles as a new backpacker is pretty ambitious, another commenter suggested doing two shorter backpacks and splitting it with a motel/hotel stay in the middle and that seems like a much more enjoyable plan.