Good luck with your switch! I tried to highlight that it's a difficult but highly rewarding path, if you stick with it.
The first time I (unsuccessfully) applied for internships, I listed my paralegal work experience and a few programs I'd written. The chatbot I mentioned in the post was the highlight, even though it was not very impressive.
When I applied to internships successfully, I was in grad school. So I listed most of the courses I'd taken. I had more projects to my name at that point too. The most exciting was a Python script that used machine learning to figure out who wrote a passage of text. I'd done that for one of my Computational Linguistics classes and was really jazzed about it.
Hope that helps!