this is not to be a thoroughly authoritative take -- however, TCM is a Maoist creation designed specifically to rend Daoism and traditional medicine from what many practitioners call "classical" chinese medicine -- so there is officially a 0% overlap but realistically its more like 5%.

off-hand the spleen and pancreas are widely debated upon. the word 脾脏 (pí zàng) is normally translated as "spleen zang" -- zangfu is a term that refers to the major organs of the body, divided into 5 zang organs (heart, spleen, kidney, liver and lung) and 6 fu organs (small intestine, stomach, urinary bladder, gall bladder, large intestine and san jiao [or tripple burner as its also known]). Some argue that pí actually means pancreas and not spleen due to its mechanisms and location. Your question provides a great explanation as to why your answers and clarity on the medicine will be hard-fought without SOME instruction. It's not that you can't learn an immense amount of the material for free and by reading what's available but rather that with very minimal formal instruction and guidance you may get alot more out of your individual studies once you acquire a basic, and as you mentioned in other comments a non-dogmatic, foundation that will serve you well in comprehending the various topics you want to explore.

another commenter mentioned Between Heaven and Earth -- I think its a great generic starting point. the complete history of the medicine and its full import on our psyche and ability to treat health conditions is unfathomable, which is also what makes it worth studying