Be careful about moving from managing a community at a large organisation to managing a community at a small one.
You might be frustrated with the multiple stakeholders and having many hoops to jump through on even the smallest initiatives.
But is that more frustrating than having no budget for any development work, having to find your own designer for newsletters and emails, and having only a tiny audience to promote the community to?
Managing a community of millions of members is an entirely different experience from fighting for the attention of every new member.
This doesn’t mean you shouldn’t do it, just be aware of what you’re jumping into. It feels easier to go from small to big than big to small.