The way in begins simply: go to an Orthodox parish, stand through the services, and stay afterwards to meet people. Above all, talk with the priest. He will answer your questions, and in time he will ask what is drawing you, and whether you wish to begin.
Those who ask to enter become catechumens. The word means one who is being taught. In the early Church the catechumenate could last three years; in English-speaking parishes today it often lasts six months to a year, as the bishop and the parish judge right. The catechumen learns the faith, prays, keeps the fasts and the feasts, and comes to the services, and is already counted as one who belongs to Christ.
At the end of the catechumenate the person is received into the Church. One who has never been baptised is received by Baptism and Chrismation. One already baptised in the name of the Father, the Son and the Holy Spirit may be received by Chrismation, the anointing with holy chrism; practice differs between jurisdictions and is the bishop's to decide. With reception comes the first Holy Communion.
