I got a job that paid me well, but I'm not sure whether i will have spare money in the future (planning on moving out my parents' house when I'm 18 and will nee

I got a job that paid me well, but I'm not sure whether i will have spare money in the future (planning on moving out my parents' house when I'm 18 and will need every cent). If I knew for a fact I'd have money every 2 years I would just buy the latest shiny Apple thing because Apple.