IMO, Honestly, at this point you probably arent going to miss much.
Youve presumably booted from an external device and installed an OS. I assume the time amd date are right.
Only question really is are you using efi or mbr boot method. If efi, you are probably fine and future proofed unless you want secure boot (windows) you may face an issue then. Thats not to say you will, just you might.