Although Orthodoxy and Roman Catholocism can look similar on the surface in such things for example as candles and incense, there certainly are differences. We have been enjoying some interesting and instructive discussions in our enquirers and catechumens meetings in Portsmouth where one of our number, from a Roman Catholic background has been noting some of the differences. He has picked up on the difference in tone as to how we relate to the saints in Orthodoxy compared with his previous experience. Another difference he has compared is in how we understand the bishops and priests in relating to Christ - his Roman Catholic understanding was that the bishop was present as vicar of Christ, as someone there instead of Christ, and the priest in turn was present as vicar of or instead of the bishop. In Orthodoxy however the bishop is the icon of Christ and the priest the icon of the bishop thus meaning that as an icon manifests or reveals or makes present the one of whom the icon is so the bishop being present manifests or reveals Christ to us - makes Christ present to us. Of course Christ is present in our midst when two or three are gathered together and Christ is present in the Gospels and in the bread and wine which are His Body and Blood -but He is also present through His icon the bishop. Some would say that these are sublte differences but perhaps they are also significant.
One very great difference is in our understanding of salvation. The classic Roman Catholic position (also shared as the classic Evangelical Protestant position) is that on the cross Christ was paying off our debt to the Father. The Orthodox understanding is that He was defeating death and the devil and providing for us the medicine of immortality and eternal life, His Body and Blood. I would certainly recommend that book 'The Life' by Clark Carlton for an explanantion of Orthodox understanding of salvation.
I am due to preach at our Church at Babingley in Norfolk the weekend Saturday 23rd and Sunday 24th January and could take a set of those DVDs with the lectures on Orthodox belief with me. Then if you are able to get there that weekend at all you can have them or else they can be left for you to collect when you can be there.
If you were to be received into the British Orthodox Church this would be by baptism and chrismation (the anointing with the oil, the Holy Chrism). If you had already been baptised by immersion then it could be possible to baptise you by pouring the water but assuming your infant baptism had only been by pouring or sprinkling (as is almost universally the case other than in Orthodoxy where babies are baptised by immersion) then baptism by immersion would be required. If you decided to follow Orthodoxy the first stage would be for you to be received as a catechumen (in a very short and simple service), that is one learning about the Faith and attending worship with a view to then becoming a Church member through baptism and chrismation.