When I reboot it tells me there are too many blocks in the superblock or whatever
So I think I didn’t allocate enough space to the filesystem (mmcblk0p5) , but IDK how to access the partitions from the emergency shell it puts me in
fdisk and cfdisk don’t work
Can you remember the exact error message? If you take a photo and upload it to an image sharing site you can post the link here so we can see it.
You can use the live ISO image instead (replace X & Y with the drive letter and root partition number):
mount /dev/sdXY /mnt
Why not? What happens when you try to use them?