A solid candidate for weirdest series of the year, “I’m a Virgo” represents an outlandish concept from writer-director Boots Riley (“Sorry to Bother You”), contemplating how the world would respond to a 13-foot-tall young Black man. As metaphorically intriguing as that sounds – and indeed, is at the start – the first season ultimately feels a bit too scattered and chaotic to match the stature of its premise.