Wow, that’s an amazing piano introduction and some beautiful voicings in there!
Some parts of the intro sound quite complex to transcribe, I find the key is to just do a little each day, embrace the slow progress, and stay focused. That’s a lot of work in transcribing just that 2 minutes of playing - i’d say months of studying, listening intently, and transcribing - just so you’re aware of the task that lies ahead Christian!
I’m not familiar with the tune, but I’ll study the form when I get a second and try to figure out what he is doing for the 2 minute intro.
Also, check out Tuomo’s 5-min masterclass on Ear Training & Transcription. I think you will find it useful guidance for aurally working out chord voicings, progressions, and melodies: