Priesthood ordinances are the pathway to the power of godliness.
Missionary work essentially is a priesthood responsibility, and all of us who hold the priesthood are the Lord's authorized servants on the earth and are missionaries at all times and in all places - and we always will be.
We begin the process of being born again through exercising faith in Christ, repenting of our sins, and being baptized by immersion for the remission of sins by one having priesthood authority.