Ways to get work:
1. Volunteer at a place which also employs people similar to you (possibly older). After a year or two, inquire about paid work. That's how I got two of my jobs.
2. Know someone on the inside. This is the magical skeleton key to 90% of the employment and academic thresholds you'll have to overcome in your life. The best is a friend or a friend of the family who can fast-track your application to approval, which works well if it's a sort of informal place where someone from another department "happening" to mention to the person in charge of hiring that "Oh, so'n'so, this person I know/my friend's kid/etc. is going to apply with us, they're a great... etc." That's how I got another job, in this case it was literally 'apply three times over the course of two months, get zero response' followed by 'email friend of family who has worked there for a year or two, get call from the guy in charge of crew hiring two days later'.
Likewise, that's why networking is important, even if you bloody hate it and everyone you're talking to.
Incidentally, this is also why it's so important to have all your shit together and appear professional when you're applying to a place which doesn't know you and doesn't employ anyone who does: people with one of those advantages are already fast-tracked, so you need to scramble to look as good as possible for whatever positions remain. It's also why you're scrupulous about always showing up to work, taking overtime hours you might not want, etc. when you're young and entry-level: just doing that will (sadly) mark you as an exemplary employee for a lot of places, as well as insulating you from the continual turnover and potentially getting you in place for a promotion while you work on whatever real education/career you're doing.