Query on modelling

Hi guys…

I thought of modelling a mammoth… So, took an elephan’ts image as a reference… Just got a side view, so just outlined it using a bezier circle… But how to subdivide the entire plane in to edges, so that i can extrude them along the side to get the 3d mesh… also how to mirror the effect to the other side so that its the same there too!!! I ve posted my plane’s image, so that you could take a look… if its not possible, then suggest some ways to model a mammoth from basic building blocks with minimal reference images…

Link for the image!

to be able to extrude the curve, it must be converted into a mesh. To do so, go to object mode, select the curve and press Alt + C and select to mesh.

And to your second question. Just add a mirror modifier