seafra, u probably know there are plenty of coptic churches in ireland, including at least one native born priest. so it would be easy to get in touch with them.
are u in touch with any oriental orthodox churches near where you live? if you joined one, then you would be automatically in communion with the british orthodox church within the coptic patriarchate.
you don't need to join a specific church to be a member of that church, eg, as a copt, if i settled in another area and then started regularly attending an indian orthodox church or an ethiopian orthodox church, i could then consider myself a member of that church without any official change of juristiction.
as for the book or revelation, most orthodox Christians, as far as i can tell, would not classify themselves as part of the pre- post- a- whatever- millenialism debate as that would assume that the 1,000 years in revelation is a literal exact 1,000 years and we can't actually be sure how much of revelation is literal and how much is metaphorical. we focus on how to prepare ourselves, knowing that we will be judged by God (before, during or after the 1,000 years that may or may not be literal) and that we need a living faith to complete the work of salvation that God, in His grace has started in us.
we copts read the entire book of revelation on the night of good friday as part of an all night service that ends with liturgy, finishing around 6am. it's one of those things u have to experience! there are loads of old testament readings as well, which point us towards preparing ourselves for the judgement at the end of the world. the liturgy is especially joyful as it commemorates Jesus' victory over death and prepares us for the next day's Paschal liturgy.