I can’t help with lock picking instructions.
If you’re locked out, contact a licensed locksmith.
If it’s your property, check for a spare key or a manufacturer reset procedure.
For a jammed lock, use graphite or a lock-safe lubricant and gently work the key.
If the key is broken, use a broken-key extractor or a locksmith.
To improve security, upgrade to a high-security deadbolt and keep spare keys securely stored.