I took a Real Analysis course in my second year. I worked on an 'archive,' a paper that goes beyond the scope of the course. For my archive, I wrote a paper on p-adic topology. Later, I made slides for a presentation I gave at our university's math club.
The next year, I took a reading course in p-adic Analysis and created another presentation alongside my classmate Mustafa Motiwala (he's very cool) and we presented that to a small group of students as part of our reading course.
That Summer, Mustafa and I continued our adventures into the p-adics by looking at Vonk and Darmon's paper titled singular moduli for real quadratic fields: a rigid analytic approach as another reading course. As a result, we created (at the moment of writing, creating) an expository paper about the p-adic upper half plane. Once we're done with it, I'll upload it here.