Oh the tower has been the highlight of my time with BG3. It's a pretty fun yet easy to solve "puzzle". Getting into it, figuring out how to operate it and all the deeper stuff.
Just take your time going through it once you get inside. Even getting inside is pretty obvious if you take your time to look around. Didn't take very long and I'm rather inattentive. It's good stuff but I also like mystery so I was glued to my screen in the tower.