I actually think this might be easier than you think. First thing is leveraging the engineering network you have and finding someone who would be open to mentoring you. Like giving you resources, ideas, help when you get stuck. Developing that kind of relationship will be super easy for you. And since comp isn't a concern, you can really come in from the ground up. But your PM experience might put you in a decent junior role, maybe you'd be the liason for the engineering team and product. Thatd be sweet