"Create 2D animations, a very powerful tool"
Toon Boom Studio is a tool for creating computer-animated images.
Although the program allows you to draw directly on it, if you don't know, don't worry, you can either scan your handmade drawings or use a collection of photos shot in burst mode, which will be joined together to create the animations. This program is easy to use but very complete, it will even allow you to synchronize the movements of your characters' lips with their voices.
To learn how to use the program be sure to stop by its forum, where you will find multiple threads talking about the possibilities of the program along with a section with video tutorials that will undoubtedly be very useful.