Some specific questions before I get into selling hand made adult toys

Summary: I’m working on setting up an Amazon account to sell my products (adult toys, which I make/pour myself. They’re solid silicone/not electronic) in additional to my website and Etsy and doing local markets and I had a few questions/things I wanted to clarify before I officially started putting up listings. I found some of the seller handbook stuff to be a little bit unclear on certain things, but maybe I was also looking at the wrong pages…

[ ] Should I file a trademark on my buisness name before setting up the first listing since you can’t add a brand later? It says a pending trademark will work but would I need to wait for it to be approved before using the brand registry on actual listings? [ ] If I make all the items I sell and I’m the only one selling them, is the branded listing super worth it from a consumer side? (I know it gives better analytics tools etc as a seller, I’m just not sure what it would do practically as a storefront) [ ] Are other sellers able to come along and randomly tack on listings to mine saying they’re selling the same thing? (Which should be impossible since I’m the only one producing the products and I assume is mostly for people ordering the same mass produced item?) [ ] Do I need do do anything special for adult toys products? I’ve been having a hard time finding info on selling them or if they need to be approved or censored on the thumbnails etc. (Non electronic, solid silicone, no graphic imagery, etc) [ ] Is it permitted to have lots of options for a single color item and then a variation for “random multicolor” that would be a patterned item in random colors? I do this on other platforms and haven’t had a problem with it, but I’m not sure if that would qualify for amazons mystery items not allowed thing or not. (The idea is to let people get more interesting colors in a way that’s actually easier for me as a maker than the specific single colors, but listing each pour individually isn’t worth it for Amazon/is something I reserve for my website) [ ] If doing FBM, can you treat returns like normal website returns where you have control over the proscess or does Amazon automatically dictate the policies? Like I don’t really want used adult toys returned to me or if I get the package and it’s been clearly opened then that’s not returned in the condition it was sent out in I want to be able to handle that manually on a case by case basis. [ ] Can you add videos to listings without brand registry? (I like adding squish videos of the silicone firmnesses so people have a visual of the firmnesses) [ ] Will Amazon automatically restrict selling to certain places or can you do that as a seller? (Saying you won’t ship to certain states because of laws for example) [ ] Sex and sensuality page was removed on the seller handbook? [ ] For color variations can I just have a stock model that shows the colors for all the different listings? Or would I need to pour at least one toy in each color and do product photos for it? (It’s all the same pigments so there’s really no variation other than the toy shape. I use little standardized swatches on all my other sites)

Thanks! If anyone has any specific things to reference in the handbook I’m also down to read. I’ve been reading through all the documentation but im sure there’s stuff that just hasn’t clicked yet or that I’ve missed.