just moved house again,so v minimal internet; will have to be brief!
1st, congratulations! (alf mabrook, if u prefer the arabic)
2nd, it is really straightforward. usually u wear white (in the old days it was done naked, bring white underwear just in case) and get into the font when told to.
exact practice varies, but often u have water poured on yr head twice, then go under the water when the priest gets to 'and the Holy Spirit'
the chrismation is done after the baptism with special chrism oil (zayt mayroun in the arabic version of the original greek).
u have to reject the devil and all his works etc. while facing west, and then declare yr faith while facing east.
u will have clear instructions (may be in english or in arabic accompanied by sign language depending on the church)
so don't worry about doing it wrong. it does not take long, but is really beautiful and profound.
after, u get into dry clothes (white) and the priest ties a red ribbon around u, which u keep on till the end of the service.
concentrate on the liturgy, especially on the parts where u repent of yr sins, coz yr going to take Holy Communion, which is awesome.
there is a prayer in the 'agpeya' for before and after taking communion, this helps. just pray it anytime after the commemoration of the saints.
when the guys get into line for communion, follow them. aim for around the middle of the line so u don't get lost. remember to take off yr shoes first! don't forget to pick up one of those handkerchiefs (there's a proper liturgical english word, but i can't remember it; it's 'lefafa' in arabic) and when u receive the Holy Body, put it over yr mouth so u don't drop crumbs. then leave it in it's place, u don't need it for the Holy Blood.
if there are 2 or more priests, u will receive the Holy Blood straight after, if only one priest, hang around and look out for the line that will form again after the whole church has received the Holy Body (most churches still follow the old tradition of men and women receiving separately so as not to be distracted in line by the opposite gender).
after the blessing at the end of the service (and usually after everyone has started to leave), dont go away!
u have to process around the church 3 times with the (sub)deacons singing and playing the cymbals and the ladies (usually) ululating. then u go to the front and the priest unties the red ribbon and takes it off u, symbolising yr cleaness. there are more prayers over u, and often more ululation!
if it's all a bit profound and u want to avoid being kissed by dozens of uncles and asked yr life story by dozens of aunts, it is ok at this stage to stay in the church for a short while praying and enjoying yr new life.
if yr up for the socialising, head out for tea and biscuits and everyone congratulating u.
yes, this was the brief version...