More worst, you won't open your wallet but it's worth trying that big amount.
Attempting to brute-force a 19-character Bitcoin wallet would be an extremely difficult task, even for a powerful computer you've said (quantum computers).  The number of possible combinations for a 19-character password is incredibly large, making it virtually impossible to crack without knowing some information about the password beforehand.

I may advise you to seek a trusted service to help you crackling down your password or brute force your password.  But take note it should be a trusted service and IMO, it was suggested above.  Go to their ANN thread and contact OP but of course, this is not free.