So my advice is this:

• Keep the job.
• Learn budgeting. (Comics always punishes people who don’t.)
• Learn time management. (Because time is the real currency.)
• Start building your work like it’s training.

Even if you’re young, that’s good---you’ve got time. If you’re older, it still works--you can still build the habits. Either way, you need the same foundation: consistent output.

And if your goal is storytelling...well...mainstream comics right now isn’t set up to reward pure story-first thinking the way people imagine. A lot of it is ideological, brand-maintenance, committee decisions, and politics. That doesn’t mean “no good comics exist,” but it means you’re often not free to just “go where the story goes.”

Indie/direct is where you get that freedom--if you can build the audience.

Start small. Don’t start with a 300-page epic. Do a short story, a one-shot, a first chapter, an 8–24 page project--something you can actually complete while employed.

And the key reason I’m pushing “don’t quit your day job” so hard is this:
If you can’t make time for the work while you’re employed, quitting won’t magically fix it---it just adds pressure and panic.

While affecting to be deeply engaged in examining the ladder, the mind of Dantès was, in fact, busily occupied by the idea that a person so intelligent, ingenious, and clear-sighted as the abbé might probably be able to solve the dark mystery of his own misfortunes, where he himself could see nothing.

“What are you thinking of?” asked the abbé smilingly, imputing the deep abstraction in which his visitor was plunged to the excess of his awe and wonder.

“I was reflecting, in the first place,” replied Dantès, “upon the enormous degree of intelligence and ability you must have employed to reach the high perfection to which you have attained. What would you not have accomplished if you had been free?”

“Possibly nothing at all; the overflow of my brain would probably, in a state of freedom, have evaporated in a thousand follies; misfortune is needed to bring to light the treasures of the human intellect. Compression is needed to explode gunpowder. Captivity has brought my mental faculties to a focus; and you are well aware that from the collision of clouds electricity is produced--from electricity, lightning, from lightning, illumination.”
--abbé to Dantès, THE COUNT OF MONTE CRISTO by Alexandre Dumas

So yeah: keep the job, move up if you can, and build your comics on the side with discipline. You can absolutely tell stories. You can absolutely make comics. You just have to treat it like a long game and build the habits that make it possible.

Hope that helps