Custom animals in o gauge

[Jason Pape]

This may be an unusual question but if I wanted to make my animals and other figures in O gauge how should I do it? I hope to make a statue or two for the country town, I’m not very good at cad how would you make them? They are all based on spheres except for the fallow deer stag, he’s watermelon shaped. I’d like your advice on how I should model them. 

[Kylestrome]

I'm afraid I can't answer your question, but here's some more inspiration if you need it: