Explain The Necrobloom to me like I’m an idiot.

Just finished building my [[The Necrobloom]] deck and tried it out tonight and let’s just say it did NOT go well. I found myself constantly milling away all of my [[Crucible of Worlds]] effects and my good creatures that let me play multiple lands per turn. I had a [[Glacial Chasm]] loop running that was keeping me safe from damage but every time I’d dredge it back to my hand and replay it, I’d mill away my necessary pieces and be forced to sac a land, leaving me even more mana screwed every turn since I wasn’t able to keep the lands flowing.

Basically, can someone explain to me the proper play pattern and the way a Necrobloom deck should be piloted? And like what combos I should be running? A lot of the combos I have seen let you self mill your entire library but I’m confused as to why I would want that? How often should I be dredging? What should the wincons be? Unfortunately I feel like I built a crappy deck and I really want to fix it lol.