Goinpostal

Hello I am new to Arma, except for a few hours playng Day Z. I have a mic. Located in USA eastern time zone. I am 50yo. Yes that is not a typo. Current games include Planetside 2 and BF3, as well as Arma III alpha. I am available to play mostly on weekends as I do not get home from work until after 11PM on weeknights. What I would like to find is a group that has fun, has their own server, and plays PvE or PvP military type missions. I believe some structure is needed, but nothing too formal. It seems like most of the populated servers play Wasteland, which can be fun, however I am looking for something more. I have never before joined a squad or clan, but I enjoy teamwork and cooperative style of play. Thanks for reading!