Question about PocketPrep for the SHRM-SCP Exam [N/A]

I am registered to take the SCP exam this quarter (May to July 15th). I have been working as an HR generalist/manager for almost 4 years now and have not taken the regular CP exam.

I notice the PocketPrep for the SCP contains 500 questions, whereas the one for the CP contains 1000.
Should I do both sets of practice questions? Or will the 500 questions be enough?

My concern is that the SCP might have fewer questions because it is assuming I already know everything in the CP and is only testing on stuff not covered in the CP.

I also notice the questions have been quite easy... way easier than other practice tests I've taken where the wrong answers are not so clearly wrong. Other practice tests I've taken have been much more challenging, where all the answers seem plausible. For those of you that have passed the SCP, could you please share some insight on your studying process and what resources you used?

Thank you so much for your time!