Expert Firebase values from collection,one screen start now

Budget:25$,please apply only within budget and having 3+ yrs of experience in firebase,android. 1)Need to get users validity date and give access to screens accordingly from firebase collection. 2)Need to add 1 screen from Firebase by getting values from Firebase and display on screen,show validation and selected value of subjects from Firebase. 3)User can view multiple subjects depending on his validity date(firebase will have value) and give him access otherwise redirect to payment screen. 4)free users 10 days,only 1 subject,1 chapter ,others visible but redirect to subscription screen,paid users access all according to validity field and concerned subjects,chapters,topics. Looking for long term. Need to ave anydesk,bitbucket,push code,review then release milestone after testing code.