Its all good ive spent last many years of my life studying and working on these kind of things so if i can offer some knowledge and get new ideas im happy to do so.

yes but your body makes all its own proteins. it uses certain essential amino acids from foreign sources (because we cant make them all). but i see your are trying to make an analogy to a substance like LSD.

however in order for a plant or a fungus to make LSD it would need a specific set of enzymes to convert whatever other ergot alkaloid it makes into LSD. it would need to aquire these enzymes through evolution of genetic mutations etc. although this is theoretically possible the types of reactions the enzyme would need to catalyze as far as i know have not been observed.