Thoughts on a peacekeeping force in Ukraine?

I support the peacekeeping idea in principle, because the situation in Ukraine needs to be stabilised. But there are a lot of open questions I have about this.

Where would they likely be deployed? How do we navigate the potential for Russian opposition? Is there a prospect of getting more neutral countries involved in this mission? What are their rules for engagement, and what would happen if Russia provoked/targeted them?

It’s not a bad idea in principle, but it’s hard to see what this would look like in practice- though I know the idea is only elementary still.