Measure out the spices into separate containers. Mix in just enough avocado oil to form a smooth paste. If you add the spices to the soap dry, they will form dry chunks and be a pain to combine fully into your soap
Start heating the oils on the stove, and combine the lye and water in a well ventilated area (wear gloves and eye protection, buddy!). I always combine the lye water outside because it's fun to mix dangerous chemical solutions where your neighbors can see.