For example, German Chamomile can be used for nerves, stomach problems, a salve for booboos, in tea blends, and as an anti-fungal. This might allow you to cross a few other herbs off of your list and narrow down your studies further. It really is better to know a few herbs thoroughly than dozens of them only slightly. Once you have your list of herbs grow them from seed. Spend an entire year watching them move through their various stages of growth.
Some plants have parts that are safe only during a certain stage of their growth.
Others have several harvests at different times of the year. For example, you might harvest the flowers in the summer, but the roots in the late fall. During the year research the herb. Draw pictures of it for your notebooks. Collect recipes for what it will be used for.