Na this is my only OS, I did end up finding a solution but I’m not totally happy with it.
I ended up just running the installer to completion another three times, the first two times the same issue occurred, the third time it managed to get into the OS without any issue, thats where I’m posting from right now.
I did notice that on the first two times (where it failed to boot into the OS and gave me the black screen) the grub menu was an unthemed grub menu. The third time (where it managed to boot into the OS) showed me a themed grub menu and worked flawlessly after that.
I have rebooted several times since then to make sure that the problem isn’t coming back and so far I’ve been in luck. It’s quite odd that the solution to the problem required me to just continuously reinstall the OS until it worked though.
I’m not sure where the issue lies, with me, with grub, with my GPU drivers or with the Endeavour installer but I hope this comment can help anyone else that stumbles into the issue, thanks for your help.