Yes you shop the order then deliver it
Yes! They will request specifically where to leave the order. Usually they simply want you to bring it right to their door and hand it to them. Some other times they have specific requests as to where they would like it kept.
Yes I do. I shop what ever the order describes on my phone and Instacart claims we are contractors but we actually work for Instacart. So you shop the batch and you deliver it to the home.