There is any simple way to forming handmade paper pulp?
My recommendation would be to make a mold. Materials:

Egg container

Plaster of Paris

Vaseline

Small box that allows a couple of inches of space on all sides
Take a egg container, Vaseline the outside lightly of the egg container, use mixed cement or plaster of Paris (my preferred material), pour half of the plaster in the box, press the egg carton into the plaster and let dry (you might need to weight the egg container so it doesn’t float out of the plaster). Now, you have the bottom half of your mold, Vaseline the inside of the egg carton lightly and the top of the plaster, pour the plaster into the box making sure to have a couple of inches of thickness, and let dry.


You now have your molds. Make your paper pulp (drier is better) pour in the mold and clamp the other mold into it gently and let it dry (probably a day or two until you can separate them.