Several issues and now won't CHIP won't function

[HipsterChipster]

This is being done Termux via Ubuntu/ssh on a Hynix CHIP that has Debian Buster on it.
1- It continually fails to install, which I'm sure has to do with the sources.list but when I-
2- Try sudo nano to alter the /etc/apt/sources list it tells me it is a read only file system so then I-
3- Use the chmod to alter any file including sources.list it just gives me :read only file system so it won't even update correctly now.
Any ideas?