Currently on the internet there are many many hundreds of templates that are step by step easy to follow diagrams. All you have to is start from step one all the way to the end to complete an excellent picture that you drew for yourself. If learning to draw is what you want to do then this is how I advise you to start. It will give you great enthusiasm and a great sense of pride if you were to begin your learning to draw quest with this as its easy to draw an exact replica of the cartoon drawing in steps.
I started using this method twenty three years ago, using comics as my reference, we did not have internet all those years ago, I still managed though. Now days with the worldwide web it is as easy as typing "draw cartoons step by step" in the Google images tab. Do this and you will see many many easy to follow step by step diagrams of certain cartoons.
To recap, if you want to learn how to draw cartoons for free. All you have to do is search Google search engine and type in these keywords. (draw cartoons step by step) Then you will see exactly what you can draw for free online. I hope this helps you on your journey to becoming an artist, good luck. Give yourself a good chance to learn how to draw you will not learn over night how to draw properly but if you follow this simple instruction you will be well on your way to learning quickly.