Recover my old wallet

Hello 13 years ago I bought Bitcoin through a broker and he provided me with a file wallet. dat today I downloaded Bitcoin core that I tried to recover my wallet.

The wallet was loaded successfully. Legacy wallet types are deprecated and support for creating and opening legacy wallets will be removed in the future. Legacy wallets can be migrated to descriptor wallets on mobile walls.

And I actually went to Option Migrate Wallet, but he asked me for a password, and at that point he didn’t set a password, so how do you transfer the assets? Is there a way? Help us with all the details.