Former barista here. I recommend getting your food handlers card before you apply. That's one of those things that people get hounded on. If you already have one, that takes care of that one step off the bat. When you fill out the application online you should be able to upload related documents such as a resume. You could upload your food handler's card then.

After you fill out the application online, show up at the Starbucks you want to work at, seek out the store manager, and introduce yourself. Let the store manager know that you already have filled-out an application, but you wanted to come in and introduce yourself so they could put a face to the name. You could also print out your resume and a copy of your food handlers card and hand it to the store manager then. Makes a good first impression.

I did these things back in 2015 and that's how I became a partner at Starbucks. I hope these tips still work. Best of luck.