What should I do? Never been in this situation

BAR21

I worked at a seasonal job and thought that I was done due to the fact I was no longer in the schedule and applied to like 20 jobs. I finally heard back from Olive Garden and Home Depot. I have an interview with Olive Garden today at 3 (for server or host) and Home Depot next Thursday. The Home Depot is will pay the same as my seasonal job (11/hour for paint sales associate). I’m really interested in the Hope Depot job now.

What should I do if Olive Garden offer me a job after the interview?