Most of us here on Cakesdecor started out in a very similar way to you so please do not be afraid to ask questions that is what we are here for. I agree with the clever little cupcake company fb, instagram , twitter and a very low cost or free website will definitely get you started and headed in the right direction. Word of mouth for sure works best locally and you can also invest in some very in- expensive car signage for less than $100 which will also help.
I think you need to trust your own instincts on what you wish to pursue. Going in too many different directions at first can just be to much so I think for now til your confidence grows and also your skills maybe just focus on one or two things. I know many areas are doing great business in cookies and cupcakes these days so I think you just need to find out what sells well in your area, that may take some time.
Be patient most of us did not grow overnight it took years to establish clientele especially with out a store front as it takes time for people to know you are even there and in many areas now there are many at home cake decorators all after the same business and many under charging.
Make sure you are pricing your cakes properly for your area and skill level but always make sure you are making a profit and I don’t mean just on top of the price of your ingredients. Your time is money and should be added into the cost of your cake. If you are not making a profit on your cakes then you are wasting your time if you are wanting to make this a business, it should then just be considered a hobby and just enjoy having fun with it. Buy only the tools you need right then and there. take that from someone who went and bought all the gadgets and uses next to none of them,lol. As you grow as an artists and find your niche you will then learn what you really need to buy but I can guarantee as long as you have a few basic tools you can just about make any cake you desire.
Good luck in your en devour I hope it to be very successful and all you hope it to be. Remember we are always here to help!
Tampa, Florida facebook.com/pages/curiaussiety-custom-cakes