I don't think facebook and websites are enough. Your market is local people.
Is there a local church paper, town newspaper, place to leave flyers. I would do that right away.
Also, please tale my criticism with a good heart. You are not doing your cakes any justice by taking photos with cluttered backgrounds.
You have to appeal to people's needed focus which is your cakes. For example:
Get your photos made with a focus on your cakes, make up a flyer,...