Note: The inside corners have to be enforced with coils to give joints the extra strength. When I attach the first edge slab, I can go in with my hand and place the coil by hand, then I go ahead and add coils all the way, as pictured in bottom photo. I then add the coils to the standing slabs other edge. I can then take a long stick and go in from the top after I attach the second edge slab to the form and push the clay coil firmly against the edges slab.
The middle photo shows a simple finish with the slabs to the piece. In the top photo you can see the addition of small arms or wings to the form. And since I will fire these in a wood kiln, I like to add a flashing slip to the surface. I let it dry for a couple of hours, then apply the slip.
I find this method very well suited for me, it allows me to make larger forms and repeat them without really making the same piece over and over. Have fun, make them good pots.