Your design should be fairly simple and should be not more than 4 colors. You can sketch your ideas on newsprint or can draw straight on the canvas with your drawing pencil. When your design is finished you are ready to paint. Tape the canvas to the table or to a drawing board with masking tape to keep it from sliding around. A filbert, a flat brush, or a bright would be the best brush shapes for this painting.
Rounds can be useful for small details.
Acrylics are stiffer paints so either synthetic brushes or hogs hair bristle brushes will work the best. Cover the canvas with an even layer of paint. Resources Mayer, Ralph. The Harper Collins Dictionary of Art Terms and Techniques. Harper Collins Publishers.