It would be easier if we could see what you are trying to achieve with sketches. I understand if you don’t want someone to run with your ideas. Those critters are adorable. Got me wanting to try my hand at it.
Adding and subtracting separate objects may be key. blending them into smooth shapes. Sometimes it helps to look for regular solids in your design and merge them into one object.
TigerMike (local hero 
) has been involved in a few topics similar to yours… this one comes to mind and might be helpful: How can i draw? - #6 by Matt_the-Rathje