Krissy (owner of Prairie Creations) spent many months developing her wonderful shaving soap. She had many test batches, and a dedicated batch of testers on this board. The resulting product is top of the line, and considered by many to be on par with Tabac.
Developing a shaving soap that will actually perform at an adequate level is very time consuming, and requires a lot of trial, and error.
Honestly, you should probably start with an easier project your first time out: make a glycerin based melt, and pour shaving soap. Recipes abound on the internet; avoid the ones where the chief ingredient is olive oil.
~~JOHN~~*Founding member of ALPHA Team*