The extreme version of this is called the Alchemy/Enchantment loop where you feed two skill-improving skills into one another. But be aware, this is the kind of thing that can end up taking the fun out of a game for some people.
Also, it’s worth being aware that because of the way later Elder Scrolls games scale enemies, any time you’re working on a noncombat skill the draugr are training.
It really is a fascinating game, and as odd as the volume view is when you’re new to it, it’s extremely helpful to be able to orient yourself.
::: late game The 5D courses were a nice surprise as well. :::