Deleted a partition when I was a newbie, turns out it was the root partition and yep grub rescue

Just:

Fdisk /dev/sda \\ starts fdisk in sda

N \\ new partition
Press space twice
Type +(desired partition size)(M/K)
Y if a thing comes up.
W \\ writes everything

Mkfs.("ext4" or "fat" if uefi) /dev/sda (number on partition you made)

Mount /dev/sda(number on partition you made) /root

You didnt know that when you were a newbie?

@HampusMa like i said, i was a noob