I need some help with my first android project.

Hi ive been working on a project for a while but ive never used android development before so I made it in html, css and javascript then used adobe phonegap build to convert it into an apk. however I can upload the file to google play and have even tried to use android studio but nothing seems to work. It says I need to change the API, rename a package and take it out of debugging mode and ive found tutorials to help with this but it still wont work. worst of all the files have somehow been designated read only so I can edit them. I know this might sound stupid since im very new to this but I can seem to find any solution to this can someone help me?