Please work out the basics first, before going into specifics - this is getting rather convoluted.
Basically, and this applies to both of your topics, you seem to look for a quite bespoke (and 'uncommon') setup, but appear to glance over the detailed direction you actually want to accomplish, which makes it hard to follow. Accordingly you are not very likely do find any 'easy' or 'ready made' guides.
Chop up your grand vision into smaller pieces, get them working piece by piece - and extent from a known-good base.