Wiley Platinum Course for June 2020 L1

Hello - I am new to this forum and have recently began studying for the June 2020 L1 exam. Being new to the program, I am looking for advice on recommended prep strategies.

I am using the Wiley Platinum course to prepare. I have went through the Ethics portion and am now onto QM. How much time should I be spending on the Wiley study plan vs the CFA curriculum study plan?

Additionally, are 3rd party prep providers such as Wiley, Kaplan, etc intended to be used instead of the study plan that the CFA curriculum provides after registering for the exam? If not, what is the recommended method of using the two together?

Thanks in advance.