Can I fix this?

I have 2 iPod Touch 5th Generations.

One without the back camera that is currently a miracle. It's casing is bent from being in my front pocket on a roller-coaster and it's screen is cracked from multiple drops and missing bits and pieces. I have no idea how well the battery is working.

The other one has the back camera. The screen is missing a V or check-mark shape piece and the battery doesn't seem to last even 5-10 minutes.

If I can find the second one, which is unlikely since it belongs to my partner who thinks he's thrown it out without factory resetting it...

I would like to know if it is possible to fix the screen and replace the battery.

I know the 5th generation iPod has a repair score of 3/10. I just don't see a clear article on fixing either the screen or on replacing the battery.

If I can't fix it myself, I did have a recent offer of $100 for both screen and battery total. That said, I have to find it first.