Finishing help!

I want to finish this canvas into a oval/circular pillow and was looking for some pointers. I’ve finished a few square/rectangular pillows by hand so I have some experience making them but nothing in this shape. Anything helps, thanks!

I want to finish this canvas into a oval/circular pillow and was looking for some pointers. I’ve finished a few square/rectangular pillows by hand so I have some experience making them but nothing in this shape. Anything helps, thanks!