There are many ways to find out about herbs. There are hundreds of books on herbs individually or as a collective. In my training about herbs I learned a lot from Tierna LowDog, MD ( www.drlowdog.com ) and her colleagues at the University of Arizona Fellowship of Integrative Medicine. In addition spending time with 7Song at the Northeast School of Botanical Medicine greatly enhanced my learning curve. Of course I read many books about herbs/plants and flowers.
There are many useful websites. I always site articles from the American Botanical Council website There website is https://abc.herbalgram.org
Another website which is complete is www.herbalreference.com This website discusses many herbs in its data base in addition to different diseases and conditions