teetering on what my next career move should be (early career)

Hi all! here's a tldr:

• I'm a first-gen/early career PR professional working in the non-profit industry.
• I have 3 years of PR experience after graduating w my bachelors in comms
• I'm struggling on deciding what my next career move should be.

I love my job but i feel like there's currently no room for upward mobility at my org and my boss isn't really invested in my professional growth or development (which is why I'm feeling antsy and wanting to jump ship) I'm not sure if the solution is to pivot to a new industry, go back to school for my MA, or stick it out at this org for a few more years.

what are y'alls thoughts about MA's in strategic communications? My current job title is comms strategist but I'm don't feel like I've mastered the full experience of the role due to my lack of mentorship. I found a few MA programs but I'm not sure if they're actually worth the debt/hassle of acquiring them. A follow up question: are certificates in strategic comms (like this one from prsa) worth my time? (my employer would cover the costs/fees for this btw) ((also my boss says they're not but idk if I truly trust her judgement lol)

anyway! would appreciate any + all guidance here. and if you all are aware of any professional development programs, courses, certificates, conferences, etc. please send those recommendations my way!