A great place to start is getting some listings up on nostr:nprofile1qqs2xugc5jyguqkj36rk0syv4tmnkjdtmtperttl7x9rqjy3ustdcvcpz4mhxue69uhhwmmwwvhxxctvwesjuer9wchszrnhwden5te0dehhxtnvdakz7zkht4n !

Then you can link to your marketplace in your bio and post some links to different products in notes.