Double stroller, toddler and infant

I have a 2.5 yr old and a 7wk old. We have the deluxe jeep wagon for bigger day trips, but I’m thinking of a double stroller. I don’t know how to contain 2 littles yet and do errands and such. Places like target I could place the car seat in the shopping cart and bribe my toddler with snacks into the front seat for a short shopping visit. I’m more looking for long walks and such, or Costco where my partner needs the full basket, but I’m still not sure how long I would need something like this because my 2.5 yr old Wants* to walk, then not, then walk, then not. I was looking at the Graco duo glider as we have the Graco infant car seat. Any recommendations?