I know I am late to the game, but this is a part of who I feel I am. So here are some if my recommendations.
1. First step in herbalism is procuring the right portion of the right plant at the right season. Plant identification is critical. Apps, although they may give you a starting point are not sufficient. A good identification book for your area is key. Even planting your own is not foolproof. I planted seaberry from a well loved and trusted source and got some kind of mallow. I just assumed it was what it said it was until a more experienced Permaculture farmer pointed out the seed pattern.
2. Your times are awfully random. :) Depending on whether the herb is freshly gathered or bought cut in a convenient bag, even making teas and infusions can have wide variance.
3. Attending classes with an herbalist should really count for something in terms of time. It is huge.
4. Diagnoses in herbalism is a whole different thing than Western medical diagnoses. It involves looking at patterns and constitutions.
5. I recently procured my Holistic nurse certification. One of the educational offerings that I took was absolutely excellent and based entirely on Michael Tiarra's book "The Way of Herbs". (Highly recommended btw). Anyways, it is outside of the scope of nursing to diagnose, but we can look for patterns and constitutions. Mock case studies and proposed recommendations are such an excellent way to put your brain to work here.
6. In your emergency kit please add some tincture of benzoin to make butterfly bandaids stick, they are nearly worthless without. And some kind of something to clean wounds such as an irrigation bottle. Emergency kits should ideally carry something for the emotional side of a trauma like Motherwort tincture and lavender essential oil.
7. Recommended books: Richo Cech's Making Plant Medicine, Maria Noel Groves' Body Into Balance, the aforementioned Michael Tiarra book, Stephen Harrod Buhner's 3 books:Herbal Antibiotics, Herbal Antivirals and Healing Lyme and if you really want to go all out David Hoffman's Medical Herbalism. Also all things Rosemary Gladstar and Matthew Wood and perhaps Susun Weed with a grain of salt.
8. And even though prompt diagnoses in emergency situations like ruptured appendix is necessary, I believe we have taken looking out after our health from our own hands and stuck in in the hands of doctors, who in many cases are trained to care for the sick and have no idea how to maintain health.