Look in a big box craft store--they often have entire sections dedicated to cake decorating--tools, accessories, pans and so on. You can also find cake decorating kits on places like Amazon.com and eBay. They have some great kits that you may not be able to find locally. Craft stores often have really great cake decorating kits. Try places like Michael's or Joanns.
There are many cake decorating classes offered in your local area. Take one of these classes and see if you are really interested in becoming a cake decorator.
The absolute best place you can find Wilton cake decorating tips at would be the official Wilton website which has a section dedicated solely for this purpose.
If you are interested in finding information on different cake decorating ideas, there are many websites you can go to. One of the more popular is All Recipes.
You can register for a Wilton Cake Decorating Class online at the website - Wilton. They offer a variety of classes, just click on the one you are interested in and you are well on your way to being enrolled. Tuition and registration fees are listed beside the Decorating Class.
There are many places that offer cake decorating classes. Community centers, craft/hobby stores, community colleges, and culinary institutes. FInd one that suits you.
Amazon has a wide range of books on the subject of good cake decorating tips and techniques. One such book they stock is "Fun and Fancy Cake Decorating Tips".
A good selection of cake pans is crucial, as are decorating bags and a large assortment of decorating tips. If one is planning on using fondant, cutting tools will be needed and if one will be creating gum paste flowers then molds will need to be purchased as well.
One can find more information on interior decorating on sites like decorating, decorating for life, all about design and many more. One will easily find information on interior decorating on these sites.
Hands
Most craft stores and local colleges have cake decorating courses. One could probably register online, but it would be necessary to attend a class in person. Check out a store such as Michael's.
There are many websites available that offer instruction in cake decorating. A few of these include Designer-Cakes, Universal Class and Learn Cake Decorating Online. There are also many Facebook pages which would contain this type of information.
To obtain a degree in cake decorating and pastry arts, one would go to a culinary institute, where the emphasis is on food, rather than to college, where the focus is on academics.