Five steps from a problem to its solution.

Help me design and build a first working prototype for this problem in Leh, Ladakh, India.

Problem: Foreign visitors to Ladakh can't easily tell which permit covers the places they plan to visit, and face repeated checks on the way.
Who it hurts: Foreign tourists heading to Nubra, Changthang and other permit areas of Ladakh, and the homestays, hotels and taxi drivers who serve them.
The moment it hurts: Planning a route that crosses several valleys, then being stopped at checkpoints such as Upshi, Kharu or North Pullu to show and verify permits.
What people do today: Visitors get Protected Area or Restricted Area Permits depending on where and who they are, checkpoints along the way verify them, and every hotel, guesthouse and homestay must keep foreign guests' Form III records.
Why it is still unsolved: Two permit types cover different notified areas, the rules differ for some nationalities, and verification is repeated at each checkpoint rather than done once, while thousands of small homestays carry the record-keeping.
What solved looks like: A traveller enters their nationality and planned route and sees exactly which permit they need and which areas stay restricted; once issued, a single digital permit is verified at checkpoints with one scan, and homestays file Form III from the same record.
Where: Leh, Ladakh, India

First, list what you would need to learn from the people affected before building, as interview questions.
Then propose the simplest version that would help, the screens or messages it needs, and the data it would use.
Keep it cheap to run, accessible, and respectful of people's privacy. Flag anything you are unsure about instead of guessing.