Vigorously seconding this as an enby in xir early 40s who's only just figuring a lot of shit out and still has so very much left to go. So much left to discovery and explore about xirselves, too.

Seconding that entire list of recommendations, as well. Xe haven't really touched the Tao Te Ching specifically but, speaking as a secular materialist post-theist, tarot and oracle decks have served xe incredibly well as introspective tools. Consider the Oblique Strategies deck if you want to sample a similar experience.

Wishing you luck!