I had a little bit of contact with Sumerian myself in university (you might have guess from my username). I was in the Applied Computer Linguistics group in a project that translated Sumerian into English (with AI but before it was cool). The takeaway was that it's too little data to really train the neurol network properly but since most of the tablets were just which king owns how much cattle and stuff, it could handle it (I, for the record, don't own any cattle)

I sadly didn't learn too much about Sumerian. I know it's highly agglutinative and a language isolate. We had an Old Orientalist in the team and it was always cool to hear about and see cuneiform and how it developed over time and was used differently in different languages