Can I change my password if I forget

If you forgot your apple ID password:

If you forgot your Apple ID password - Apple Support

If your device is disabled or you forgot your passcode, you will need to erase your device

Follow the steps in this article:

If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

If you have a backup you can restore it from that

Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

Good luck!