Once you start blending, you cannot leave the soap. You have to keep blending until it's ready to be poured into the mold, ok?
As you blend, the soap will turn opaque and you won't be able to see the end of the stick blender. It's called emulsification. Continue blending until the soap starts to thicken and it coats the stick blender and sides of the bucket. This stage is called Trace.
At this point you can put your blender away and use the stainless steel spoon to stir in your scent. I use my blender for a few seconds to mix in the fragrance because once I did a poor job of stirring and it just didn't turn out well...
Pour the soap into the mold immediately. If you want a decorative top on your soap, wait a few minutes until it hardens a bit. With a chop stick make a swirly pattern across the top or whatever you want. Sorry, no picture!
Let soap set covered for 12 hours, bang it out of the mold, cut and let cure for 3 weeks. I leave it sitting on a shelf and turn it every week or so if I remember. The soap is fine to use after cutting, it just disappears quickly if you don't let it cure. Happy soaping!