Hello,
Thank you for contacting Rank Math today.
Just head over to WordPress Dashboard > Plugins > Add new. Since you have already downloaded the files, click on upload then install and activate. The plugin should take you to the Setup wizard once activated. Here is our guide on setting up: https://rankmath.com/kb/how-to-setup/
Hope that helps. If you have any further question(s), please let us know. Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.