I'm about to quit my job and I'm absolutely terrified
That's understandable, but why do you think you're scared of quitting your job?
Job is the only thing which makes me happy
If your job makes you happy, why quit then? You should try to find something as a back up before you just quit your job.
It's cool I got savings so I'll be okay.
It's good that you have your savings for when you quit your job as a back up, and even if you are happy with your current job, it is okay to quit it if you think there's better opportunity elsewhere. I do hope you find a job that you will be financially stable and at the same time content with what you're doing so that you don't have to think to quit again next time.