Here is what I would consider an excellent overview of the main worship service in the Orthodox Christian Church, the Divine Liturgy.
Our Lord, at the Last Supper, said "Do this in remembrance of Me." As can be seen, in the Divine Liturgy we commemorate many of His acts toward our salvation, from his incarnation in Bethlehem to His second and glorious coming.
I know that for many of my Protestant brethren, this worship service may seem to be very strange and elaborate. But I would contend that the Divine Liturgy and other services of the Orthodox Church are in fact Biblical.
For just one example, most Protestants eschew the burning of incense. But the Prophet Malachi foretold in Malachi 1:11
"For from the rising of the sun even unto the going down of the same my name shall be great among the Gentiles; and in every place incense shall be offered unto my name, and a pure offering: for my name shall be great among the heathen, saith the LORD of hosts."
Incense was used in worship in the Old Testament, above the Prophet states that the Gentiles will also use it to worship God, and in Revelation we read that it is also used in heavenly worship. At no place in Scripture are we ever told to abandon using incense in worship, yet many Protestants have done so, IMHO simply just because the Roman Church used it and when they Protested against the Roman Church they also IMHO abandoned some completely Biblical practices merely because they reminded them of the Roman Church which they had left.
I know that for many of my Protestant brethren, this worship service may seem to be very strange and elaborate.
Yes it's overly elaborate -- I've been party to many Catholic services. That said, do your thing. Frankly, the Lord will know your heart.
So what comprises proper worship of God?
The truth is, "proper worship" is a far more simple matter than some believe it is.
Giving glory to the Father and the Son, building on a personal relationship, love of fellow man, maintaining a fellowship in or out of God's House, forgiveness, sharing the Gospel, refraining from putting the World before the Lord....
IMHO, making the criteria and requisites for acceptance into Heaven so heavily ensconced in rituals is making too many who WANT to believe give up completely.