I haven’t used the new plug-in, but….
I would import and organize the media in to fcpx. Then export fcpxmls of any sequences from Resolve and import those in to fcpx.
I would not try and get the Resolve organization in to fcpx, I would keep that a separate process. Fcpx has much better organization tools anyway and it will be good to start the process anew using those tools
Jeremy