You're not the only one fascinated by it. It's not meant to be a conlang you can speak in real time. Are you learning Ithkuil or Ilaksh (the revised version)?
'Learning' would be the wrong word. I don't think even the best linguist would be able to memorise every single inflection, what it means and how it's used, and access that information fast enough to construct a grammatically correct and meaningful sentence in, as you say, real time. When I attempt to translate something, I just refer to the site and review each morpheme, or morphological category, I need. I'm mainly interested in Ithkuil.
How about you? Have you made any progress in these conlangs? If so, can you understand what I wrote in Ithkuil in the original post?