Open Wallet in Bitcoin Core and look at the transaction history to get an idea of when wallet was created.
If it was created more recently then I can tell you that without any hints you will never solve.

If you dont want to give up then maybe visit hashbull.org and use there interface to extract hash needed to crack.
After that you can continue using their simple menu for cracking.

If you do find hints or something and still need help, reach out.

Dave