Americans definitely have accents
I was lucky enough to get started on Etsy in the bad (better!) old days. At that time the forums and teams were great places to discuss and learn. Honestly my market is such a particular niche my biggest growth and development came from being a real, integrated part of communities/forums where my market hangs out -- natural parenting places. It is actually harder now with an 8 year old and several of those communities defunct/ aged out.
I am definitely all about the niche marketing. Although I will say that I started by breaking the niche open a bit and bringing the very particular items (play silks) out of a tiny educational community (Waldorf) and crossing over to the mainstream with bright colours (they did only nature colours-- and I got flak for my brights!). Also with a long lasting, higher price point toy like silks, I always need new customers. Moving to more yarn means working with something more 'consumable'.
Maybe not whT you asked
L