So we have the company website made by a professional in other state. The lady created the theme herself so I could not edit it until I realized that I have to install wordpress on my computer (download server, MySQL and phpMyAdmin) which I successfully set up but the installation required new user, by creating new user now I can edit the theme layout and everything, but the whole point is to be able and use these functions with existing website.
Question is how do I share/transfer ability to fully edit the themes and keep back ups with the existing webpage? Also I cant export installed themes from WP is there a working plug in? Sorry I am completely new to this