I asked my boss what’s going on with shifts he was like go door dash until hours pick up but I’m good he got me I’m A1 what does he mean A1?

TOPS......good to go.....

I don't exactly understand the entire question, but A1 usually means "top quality" or "all good", at minimum, it is used to say that I have no problem with what you are doing. I like what you have been doing so keep doing it. Sort of like A-OK. A1 means top notch.