Adam and Eve were placed in the Garden of Eden with the charge to expand God’s rulership and glory until the whole earth would reflect the Creator. Christ echoed this in His prayer through the statement, “let Your will be done, on earth as it is in heaven”, meaning the rulership of God over all of heaven is to be extended into this realm He created.
An important point to consider is that when God put Adam in the garden, he was to “take care of it” (Gen 2:15). A similar language structure and implication is used when describing the priests serving in God’s temple in Numbers 3:7-8 and 8:26 where Moses lays out the Levitical priesthood’s service. Thus Moses’ language of tabernacle worship is used to describe Adam and Eve’s work in the garden as they “guarded and kept” that place.
We could then state that this first couple’s activity of service was regarded as worship when comparing it to the later event of tabernacle activity.
I want to encourage you that serving the Lord practically is worship and as Christ indicated to His disciples, it is part of every believer’s calling and responsibility. Ask yourself the question: Where can I serve in the world I live - and thus worship the Lord Almighty?