For anyone interested in learning Sumerian, there is really nice introduction "Learn to Read Ancient Sumerian"[0] by J. Bowen and M. Lewis, which gives you rough ability to understand some grammar and also read cuneiform. It's extremely niche topic and I can guarantee that you'll have absolutely no use for this knowledge[1], but if you're into learning exotic languages, this can be fun. At least it was for me.

[0] https://www.amazon.com/Learn-Read-Ancient-Sumerian-Introduct...

[1] To some extent you can see the same cuneiform symbols in later Akkadian texts, but forget about the grammar.