If your goal is to "find a learning project," I suggest finding a very different "learning project." Otherwise, keep "Kate's app" private, word-of-mouth, invite-only for under 20 people.
The 1980s and 1990s are long-gone, you can no longer "learn as you go" when the consequences of your application malfunctioning have real-world implications.
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A few years ago, my employer used an HR app that appeared built by a novice. In that time period; they sent me a PDF with tax information for half the people in the company; and then they royally screwed up the tax information sent to the IRS for me.