Choose a subject you can check yourself: birds, films, gardening or something else entirely. Ask Claude to create a small game with five questions, three answer options and a short explanation after each answer.
Write the questions yourself the first time. That lets you focus on how the game works instead of also having to check all the facts. Ask for clear text and large buttons that work on a phone.
Once you can try the game, look at one thing at a time. Is it clear what to do? Is the feedback visible? Can you start again? Small changes can make a big difference to the experience.
It never has to become a public app. A small game for the family can be enough for a first project. And you have practised something useful: describing how an idea should work for another person.