wordpress to app

i have a wordpress E-commerce website i want to convert it to android app and with the help of youtube i'm able to convert my website into an app, i just giving my website url in it and i want to do login with my app into my website and it should save my login info in my app so next time when i'll open it i will be in my account automatically and then can do shopping... and also a new user open my app for the first time it should ask to login or signup... can anyone do this?? (app should be in android studio only)