Is there a way to change password or get into my wallet with that file?
What can I do to recover the wallet?
No, you can't without brute force the password.
If your password is long and you don't have any clue what it is, like totally random chars, forget it.
If you can remember part of it, a phase or something, there is a change to brute force it.
What does brute forcing the password means? How to do it? I might remember some part of it, or at least I can guess some, but what is the procedure?
Is it saved in that .json file in an encrypted form or something?