Namaste.
Brahman is a totally intangible and unimaginable concept for any level of the mind, intellect or conscious awareness to grasp.
Self-inquiry and Jnana Yoga can only lead one to the door of the "I Am"...it may even open it to reveal what exists beyond, but it is up to the aspirant to traverse through it to reach the 'other side' of perception.
No book, no philosophy, no amount of knowledge can bring enlightenment and that is why 'advaita' is usually followed very closely by the word 'vedanta' which basically means 'after this, you're on your own'.
The way through that door is by doing [i]yoga!
I'm not talking about physical postures here, but other paths which take over where the path of Jnana Yoga ends...for some, this is Raja Yoga (Meditation)...for others, it is
Bhakti Yoga (love)...for others it is Kundalini Yoga or Tantra Yoga...whatever it takes the individual person to transcend the mind...transcend learning and knowledge about 'what is'.
Like Starman said, people will choose (or the path chooses them) whatever fits their personality and seeing as how everybody's personality is different, then every path will be different...even though this is all
mithya as well.
However, a bit of background info about Adi Shankaracharya...the first 'Jnana Yogi':
https://vedanet.com/2012/06/13/the-f...hankaracharya/