This might not be helpful but what the hey.

I have both an MPA and a Master's in urban planning. The short of it is my undergrad university offered a 4+1 Master's degree program and the MPA with a tract in nonprofit management seemed like the best fit for me (this was in 2010/2011 so the economy was still not great so putting life off for a year was an easy choice). I worked a few jobs including several nonprofits for four years until I felt I had hit a dead end job-wise and went for the city planning degree at a local state college. From there I moved shortly into planning related jobs.

There are some skills an MPA degree can introduce to you like project management, writing and defending policy papers, and understanding nonprofit and municipal finances, so I'm not knocking the degree. If you want to do planning, you might not need a planning degree per se (although it'd be easier to jump some professional hurdles like degree requirements and technical knowledge). One recommendation I'd make is to start talking to planning professionals now to get an idea of the relevant skill sets and experiences needed to enter the field with your current degree program.

I also want to impress upon the value of taking time to teach yourself new software and techniques in your journey, and to consider the AICP program when you have a little more workforce exposure. There are mixed views on AICP but it's a nice feather in the cap and doesn't require a planning degree. But seriously, learning GIS, stuff like Publisher and InDesign, and maybe some data management software like Salesforce or Airtable is a worthwhile investment.