en_tn/deu/12/06.md

the offerings presented by your hand

Here "hand" represents the whole person. Alternate translation: "the offerings that you present" (See: rc://en/ta/man/jit/figs-synecdoche)

your offerings for vows, your freewill offerings

"your offerings to fulfill a vow, your voluntary offerings." These are types of offerings.

the firstborn of your herds and flocks

God requires that the people give him every firstborn male of their livestock.