App development, prototype sprint

Hi, thought I'd drop anyone/everyone a message.
Love the content here, really nice to receive a digest email every week with some great articles, thought I'd add mine.

I'm a full-time Senior Developer and have taken some time off (5 days to be precise) to take an idea I've had and thought about for 6 years and turn it into something real.

I'm on day 2 right now, and genuinely hoping to have a rounded prototype by end of play Monday next week. It's quite a tall order but 24 hours in I've built authentication for users, subscriptions, notifications, some form of branding and design work too. Today and tomorrow are all about some of the core functionality.

At the moment I'm concentrating on desktop web only, but will be moving on to build the iOS and Android apps.

For anyone that's interested, tech stack is Laravel and Stripe for the desktop app, which will move to React on the front end with GraphQL, and React Native/Expo for the mobile apps.