Kristian, I think Sue did a pretty good job answering your questions. I'll focus on calculating dosages.
If you mix the 2 oils you have now equally you will get mixture that is 14% CBD and 35% THC, or 49% total cannabinoids. That's a little low so you can make first batch a little stronger with more CCO per batch.
Base unit for full batch is ml. I would go ahead and make full batch at 4 ml CCO to 17 ml olive oil, then add the additional 45 ml olive oil with 15 ml liquid lecithin, to make total 81 ml and fill the capsules, about 90 or so. Don't worry, you'll be able to use all of them.
Start by dosing rectally only, not vaginally, 1 capsule 5 times a day (30 minutes after taking the supplements).
After 4 days if she feels ready then increase to 1 rectally and 1 vaginally. I have no experience with vaginal suppositories. It's mucosal membrane so will be absorbed well, but may cause some euphoria. Theoretically it shouldn't. If it does and she's uncomfortable with it you can instead do 2 capsules rectally. With practice you can get them side by side just past the sphincter. Be careful not to push one up too far or she may get euphoria.
With the next batch you can increase both dosages at once or the one rectally first and other after you run out of lower dosage pills. Whatever she is comfortable with. By that point it will become intuitive. Just increase when ready.
Last thing on supplements. Chamomile tea has some apigenin but not much. I found 50 mg capsules online from Swansons. Alternatively you may find product called Amentomax where body building supplements are sold. It contains amentoflavone which is another good competitive inhibitor.
Relax (as much as you can right now) and know that just starting the process will start helping mom, and as you proceed it will quickly become much easier.
p.s.: When you use up 66% THC just continue same with 80% oil.