Kristina, how long have you been making soap? Just curious. Who is requesting an olive oil soap from you? How long are they willing to wait? If you explain to them that the cure time for olive oil soaps is much longer than for other soaps, perhaps that will impact their desire for the soap. If not, well, you need to tell them that you just don't have any on hand and that it will be at least 9 - 12 months before you have any available because that's not your 'specialty'. For me, I like the Castile soap I made 15 months ago, but I am still giving it more cure time to see how it changes over time. I've made more since, of course, but all of it will not be given to anyone until I am sure I think it performs well in the long-run.
Those are my thoughts on the matter.
Here are some ideas if you are serious about making a Castile soap or a high olive oil soap. I want to emphasize this is JUST for EXPERIMENTATION and not to sell or give away until YOU have personally tested them yourself after a good long cure.
Try the Dual Lye Castile soap method. (You can use the Soapee
lye calculator for dual lye recipes.)
Make it CP (I think it comes out looking nicer & you can do colored swirls if desired.)
Try it with different kinds of OO: Mix regular OO and Pomace OO, or each alone. (Pomace traces faster, so be prepared.)
Experiment with the vinegar in place of water method.
Try it with added sugar for bubbles.
Try it with Sodium Lactate to help it unmold sooner (not necessary, but helps if you want to free up your mold for other soaps.)
Try it with added salt for hardness.
Take abundant notes, throughout the life of the soap.
Read, read and read some more on the threads about high olive oil recipes here and elsewhere.
In fact, I agree with The Efficacious Gentleman, do the reading first.
In your reading, it would be good to look for comments about what the soap is like after different lengths of cure time. Sometimes people include that information, sometimes they don't. If they don't you don't really know what to expect unless you've done it yourself.
Here is a report on some single oil soaps, an experiment that is actually quite fun to do on your own.
For me, soapmaking is fun and I love experimenting with new-to-me ideas or techniques. But experimentation without abundant note-taking is next to useless for me as my memory is not perfect by any means. Besides, I believe soapmaking is a science (as well as an art) and without note-taking scientific method is simply a shot-the-dark.