Finally got it working! Now the real fun begins 🤩😃 (Turns out the PERC S300 doesn't like anything but Windows, so had to fix that with a H700 off of ebay) :
Dell Y159P | Perc S300 Modular Raid Controller - Serverworlds
Dell PERC S300 PCI Express x8 SAS RAID Controller DP:/N: U558P | eBay