Looking for a Side project to gain more experience in Product Manager (Software Engineer -> Product Manager)

I'm transistioning from Software Engineer to a Product manager role and I know there are others looking for the same side project and are in the same boat. Why not colloborate and do something exciting and learn from the experience.
I'm looking for like minded people in the same boat

We can chat and discuss different ideas and use our engineering skills to develop something from scratch to gain the experience.

I'm also interested in joining groups or collaborators that have already started and I would be happy to share my experience and learn from the process.

I'm open to work on part time basics under a mentor as well.