Fill Data Automatically After Choosing Name

I'm trying to create an invoice with customer list, and the problem now is I'm trying to find a list-dependent data way to input my customer's address.

At the moment, all I can do is a dependent dropdowns from a sorted list (see method here). So it's kinda troublesome in such that my list (of customers) opens up a list for address that has only one option (since there's only one address for each customer).

I hope there's a method out there whereby I can have a list of customers, then select the customer I want, and the address of this particular customer will appear in another cell below automatically (without the need of selecting it in another list).

My address is actually split into three different cells - Address, Building & Postal Code.