Awesome! I’m so happy to hear that you were finally able to sort it out and to install DevKinsta! 
Thanks for sharing the steps taken from your end as well! that would be very useful for other users that may be experiencing similar issue in the future! 
Nice! glad that you found my answer at that another thread! 
Also, in case you would need to edit the WP files with software/editor (with Visual Studio Code for example) but it can’t open any of those local php files - you may need to map that WSL network path to the local drive first as I mentioned here
In order to access the local Database, you can use Adminer DB tool as shown in our doc here .
best regards,
Agus