Hey I need to do manual shipping and we don't have a 3PL

Hello, I am setting up a store with paypal as the payment method.

However, we’re running into a problem where we want to do our own fulfillment. Which means we want to ship the products on our own manually. This would mean we will calculate the shipping cost and etc manually.

I don’t know how to do this in the setting, and it says that customers cannot checkout if I don’t touch it

Set up a shipping rate in Settings → Shipping and delivery so checkout works, then mark orders as fulfilled manually.