You'll want to look at the -> macro. Read http://clojure.org/data_structures.
You can also omit nth in two cases.
(let [nestedDS ["foo", {"hi" "there", "hello", ["buddy"]}, "hi"]
foo (nestedDS 0)
there (-> nestedDS (nth 1) (get "hi"))
buddy (-> nestedDS (nth 1) (get "hello") first)
hi (nestedDS 2)]
(print foo there buddy hi)
)
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