Autofill Via A Combo Box

Hi sorry I am only new to this, I am trying to learn as I go so please excuse my ignorance. (I have done some searching on this forum but am just getting more confused)
Anyway
I have a form which is based on a table that holds all the info for orders placed by customers.
It holds info on all the orders plus some info about the customer

Example of Orders Table

Order ID
Customer No
Suburb
State
Item Number
Qty Ordered
Description
Length
Weight
Order Type
Day Received
Last Dispatch Day
Actual Dispatch Date
Comments
Date Due at Customer

On this form I would like a combo box which is linked to a Customer table which has all the details regarding the customers. When I pick the customer I would like all the other fields relating to the customer on this form (Customer No, State, Suburb) to be auto populated to save entering data individually.

Example of my Customer Table

CustomerID
Customer Name
Customer No (not unique)
State
Suburb
Customer Factory
Rail Terminal code
Destination Rail code
Destination Road code
Cust Code

I have tried many different ways but no success.

Any help or advise would be most appreciated
Tks