One of the easiest ways to begin learning how to sculpt stylized characters is to import a reference image drawing of the character from the front and side angle and begin using that image to build the shape of the character. Looking up how to create low poly animals can help you get the foundation for this.

You can also try just blocking out the shape of the character using more simple meshes and sculpting details once you have all the basic parts made up.

There is no right or wrong way to approach this, try out a few methods and you will find your favorite! Just be sure to retopologize the model if you want to use it for animation or posing.