Out of curiosity but if anyone hand makes kitten gear such as cat ears or collars can you please help me with a few tips?!

I'm releasing an online shop for homemade resin stuff and cosplay cat ears/collars but I am new to the small business scene.

What website would be best to sell these items with? If the products I make mainly for looks and cosplay purposes (not bdsm durable) what are some money friendly supplies I could start off with?

I know this isn't exactly around the bdsm kittenplay area but I would like to eventually bring my skills to that level of quality some day 😸💖