BPP or Kaplan

I would stick to:
OT notes and videos
Revision KIT / Past Papers and their answers for reading.
Technical Articles to read and master them.

This will be sufficient for you to pass (no study next needed to be honest)

I recommend BPP Revision KIT I found it usefull and used it for each paper.
Questions are structurised by topic so it’s quite helpfull and it has a commentary about the question approach so it’s a hint when you are stuck but don’t want to look at answer.

However BPP language is quite difficult both study text and RevKit answers.
As far as I know Kaplan has a more friendly easier to repeat and remember language.