Sorry, I learned it myself while referring to the videos of other players, so I don't know the details.
However, you may be able to get an answer by joining Discord server and asking a question.

Hey there Boydie. For console the only really big trick that needs explanation I take would be the Pauseclip.
It's achieved through building up as much speed as possible facing a wall and then trying to pause the game on the frame right before hitting the wall to clip through. There is a Guide linked from a year ago for any% w/ flight on console, which should also explain it in video. Otherwise i generally would suggest to just try and follow a run on the leaderboard for the route.
For The Bossfight you could also use a tutorial of the PC version for parts. (if you're going any%)