I honestly wouldn't do a fully online one. I'd try and find one that does at least some in person nights or weekend stuff, or work something out with your employer if you can where you can swing a class or two during the week. I know i sound like an old fogey, but its a lot easier to forge meaningful connections that way, and its kind of fun going back to school.

I'm sure lots of the fully online ones have regular in person events and the like where that can happen, but you would want to do some research as to what the uptake on those are. If its just a weekly happy hour or something that the same 2 people show up to each week, it isn't going to do much for you.