How does Aldi work as a shopper?

Instacart shoppers are heroes to me. I haven't seen the inside of a grocery store in years. I always tip at minimum $20 and try to make their lives easy.

Because I don't want any undue hardship for shoppers I've been scared to order from Aldi because I don't understand how it works. 🤣 Do I need to order bags in my order? How do I estimate how many?

Is Aldi as miserable for an Instacart shopper as it is when I go there myself?