Your recipe is very close to my first batches and I think you'll like it. Olive oil soaps are better with long cures. Yes, use the amounts of oil and lye that a
lye calculator calculated. If your scale displays grams, I'd use grams instead because grams are more precise. Use distilled water.
In my beginner days, I got all my oils at the grocery store. There is a vegetarian shortening that is 100% palm oil. I'm leery of shopping for soap ingredients on Amazon because there's a lot of cee-rap on there.
If you are feeling like you need a review course, Soap Queen's videos for beginners are excellent. Good luck!
Also I've never used pomace so can't answer that question.