Onboarding process?

I just got hired for curbside as an in store shopper and I’m super pumped, but I’m interested about the timeline of the hiring/onboarding process. I go in tomorrow to submit my paperwork and have a background check done and I was told it can take a few days to a couple weeks to get the BC done. I’m also still working at my current job and don’t want to quit until I start at HEB. What seems to be the general timeline for getting hired? how many weeks does it normally take?