The above thread has some info that may be useful to you.
I'm sorry no one was responsive to your inquiries. A lot of Armenian parishes are underfunded and understaffed. There have been times when I have tried contacting other parishes by e-mail, only to get no response.
You don't have to be Armenian to be a member of the Armenian Church. I know some converts, and there is someone on this forum who is thinking of converting.
That being said, if you go to a parish with a lot of recent immigrants, you may run into some xenophobia. The Armenians have suffered a lot of persecution over the past century, and that tends to make people more closed and suspicious of outsiders. Of course that is not an excuse for unfriendly conduct. It is, however, an explanation.
How you are received into the Church depends on where you are coming from. EO's are usually communed without any conversion process. I think Catholics may be received by Chrismation, but I am not sure.
One thing to warn you about is that Armenian liturgies are not in English. If you want to visit an OO Church with an English liturgy, you may want to try to find a Coptic parish. They are more likely to have that.