Ah, gotcha. The greasy feeling is probably from the oils that you used. You can offset that with a little bit of isopropyl myristate, or you can use lighter oils like grapeseed (low price) or meadowfoam seed (pricey). You can also try upping the emulsifier or lowering the amount of oil to see if that helps.
Make one change at a time, and small batches, so you know what is working and what isn't. You got this!
Yes, you change it back to weight when you are ready to make your recipe. You can use one of the other calculators on that same page to help you with this. Also, I do recommend grams because the math is so much easier! For instance, if you make a 100g test batch, your gram numbers would exactly match your percentages. For a 1000g batch, it would be your percentage number with another zero on the end. That's my kind of math!