Canada has a good run of late with homegrown series including “Schitt’s Creek” and “Transplant” finding success in the US.You can add “Jann” to that list. Both seasons of the comedy series, which premiered on Canada’s CTV in 2019, are now available on Hulu and are (very loosely) based on the harried life of acclaimed singer/songwriter Jann Arden, who co-created the series and plays herself.