No idea on a catechumen, and they may consider you one after attending regularly for a certain period of time. It was never an "official" thing with us. They just started considering us such after a couple of months, but that included having home visits and other discussions.
As for chrismation, that will depend on you and the priest. I've known some people that it's a year for and others it's two years. We were considered "quickly chrismated". We were chrismated 6mos after we started attending. However, it was known that my husband had been studying and leaning EO for a couple of years, we were well versed in church history and various theologies and made it clear that we weren't going anywhere. We also needed to settle due to the children, this was a family event. Let me tell ya, it was quite something coming up with godparents for nine people and scheduling a christmation on a date that EVERYONE was able to be there at the same time...and don't you know, we had the biggest snowstorm of the year the night before. Neighbours were helping to dig us out...most of us missed Liturgy but made it in time for the Chrismation. Even those living several towns away made it...it was a miracle for certain!