Welcome to the forum.
I'm also a resident of Dallas and a parishoner at St. Seraphim's (the church with the pictures posted below) for the last 16 years. Honestly, the majority of the parishes in the metroplex area have services all or 90%+ in English with large contingents of converts and cradles who are 3rd+ generation Americans--iow, you could pick almost any of the area parishes and not be too concerned about finding 'ethincity' to be any kind of barrier at all.
If you live in McKinney, the ROCOR parish DavidH suggested might be a good option, although I understand it is very small (not a criticism, I just know different people have different preferences about parish size). Just slightly to the south, in North Plano, you'll find St. Sava's, which is a very dynamic parish in the midst of preparing to start on a new building. St. Seraphim's, the cathedral for the Diocese of the South and still the home of the retired Archbishop Dmitri (a native Texan, and the first American convert to become a bishop in the Orthodox Church) may be a bit of a drive for you (straight down 75), but it's definitely worth a visit.