Go really slow and be prepared to babysit your soap.
My first batch of honey soap volcanoed all over my kitchen, I mean everywhere. Foamy, soft, HOT, gooey, honey smelling soap. I swear, that soap expanded to at least 6 times to volume when it blew up.
I cried for a few minutes, scooped up what I could and left the rest for a couple hours to cool down, then I scraped it up the remains with a putty knife. Thankfully it only covered the table and floor, both were no worse for the wear.