LARPed my way into an internship and now they want a whole app built!!
So my sister is an intern at an agency and they wanted an app built so I made a demo put it on vercel and for database used supabase, and they liked it and called me for a meeting. There they showed me a few reference websites and what features they want in their app. I know the basics what it takes to make an app like costs and stuff but not more than that. I need help , they said they will start with android and smaller targets first and gave me a task to give them estimated cost of how much it would take to run a basic version with a few of their wanted features. What do I do? Any ideas? Where should I look? Ask AI? I want practical advice as to what might work for backend and stuff and what language I should use. They plan to let me make the app and in the future when I am gone(will be going abroad for masters)they will hire an intern to pump data into it.