Questions about Bach toccata 916

[sallycake10]

I am working on Bach Toccata 916. I find it a little bit difficult. How can I play it neatly for the whole piece? I especially struggle with the 1st movement bar 35 the third beat when the left hand changes from sixteenth notes to eighth notes, both hands become difficult to coordinate, which affects the rhythm of the following phrases. Is there anyone who can give me some suggestions on working on this piece? Thank you so much! 🥹 🙏🏻

P.s and how can I accurately play all the notes of the third movement?