unzipping and saving email attachments

iOS and iPadOS

on my iPod touch with iOS 12.4 latest OS, I got an email with a zip file as an attachment. Using my bluetooth keyboard I shared it to files, hit the save on my iPod button but the add button remained dim. How do I save files, like a zip file, and unzip it and read its contents on my iPod touch? Or is this not possible and I should just use my windows computer for this task? and regarding braille, is there a way to turn off the cursor or the cursor blink option?