That's progress there. You've taken a lot from eishiya's edit (glass). This is good, and the latest result almost aces it. Almost, because you can scribble in some small highlight in there. If/when slime-guy moves but the highlight is static this will be more obvious I think.
No edits on my side, just 2 cents for future reference:
When you struggle with a complex material priority #1 is to abstract it, make it read. And consider for example use cases, what background it is seen in, how it functions, is it animated?
Don't overthink at the outset. Pondering over room reflections in post #3 is an example of overthinking. Fantastic that you're studying physics of light, a backend of useful knowledge informs and improves results, but probably won't be seen here, especially because it's stylized. The ultimate question is: will it blend work?