CPM Certified Portfolio Manager exam — how much study time is actually realistic?

I'm a project manager with about seven years of experience looking to add the CPM to my credentials. I've been told the exam is harder than most people expect coming from a project-level background because the thinking required is genuinely different — you're evaluating trade-offs across a whole portfolio rather than optimizing a single project. That mental shift alone seems worth spending time on before exam day.

My current plan is about 10 weeks of study at roughly 2 hours per day. I've been working through the AIPM and IPMA frameworks since those seem most aligned with the exam content. The resource optimization and strategic alignment sections seem to carry the most weight, so I'm front-loading those in weeks one through five.

The passing score is around 70%, which sounds manageable, but I've seen people with 10+ years of portfolio experience fail on their first attempt because they underestimated the governance and benefits realization sections. I don't want to make that mistake. Has anyone found specific practice question banks that closely match the actual exam difficulty?

I'm also wondering how much the essay-style questions differ from multiple choice in terms of scoring weight. If they're worth more, I'd probably shift my prep to focus more on being able to write structured responses under time pressure.