look into apprenticeships, or volunteer at a charity shop or something. looks good on your CV if you've got some work on there, even if it's volunteering. free experience, my mang. also, get discounts on already dirt cheap stuff doing that, and meet some cool folks.
also check out if you've got any free courses you're eligible for locally, like IT or maths basics. more good stuff for your CV.
you ain't ruined your life at all. you're only 19. you've got many years ahead of you if you're lucky. chin up, bruda. much love. :^)