If you open the file in a text editor, does it display the plain text of the private keys?
If you go to a site like this (and run the software entirely offline not putting in any passwords) what happens to the file, does it display the plain text? (https://www1.udel.edu/it/help/pii/encryption/windows_use.html) - the first aes decryptor I found?
If you want to work out if it's a private key, they'll generally begin with an 'L' a 'K' or a '5'
if i open it in plain text it shows something encrypted idk if they are priv keys.
But what i know is https://github.com/blockchain/my-wallet-backup-decryption-tool
this can solve my problem but i need to know how to use it i am not too geeky.
Download the file and open the HTML file inside.
Then upload the file and put in your primary password (the secondary password can presumably be left blank).
Note, if that doesn't work, you'll have to use linux.
Do this completely offline as well!