The industry IS impossible, and it's only a fraction of the world's actors and singers that ever go anywhere in showbiz. You could keep on struggeling, and not give up even if it is very difficult to make it. It's not unusual for some actors to have their breakthrough a bit late, such as Harrison Ford, who worked as a carpenter before he starred in Star Wars.
Right now you probably need a "daily bread" sort of job. If you enjoy being on a stage, why not try waiting tables, telemarketing or something like that. It's nearly like acting and it actually pays