download python3
https://github.com/3rdIteration/btcrecover and run
./btcrecover.py --wallet=/path/to/your/wallet.aes.json --correct-wallet-password=Y0urWa11etP@assword! --dump-wallet /path/to/where/you/want/your/decrypted_wallet.txt
Before you do this, learn how to use python or set this up ufcourse.