MS Access Form

I need to build a sales order entry form in an access database where the user can select a customer, enter shipping details such as address and shipping method, then select the items that go on that order. Sometimes those items get built out of other items, so each line on the sales order will need an option to add subitems that will be used to build the line above. I have a sample database and a rough sketch of what the form needs to look like. I have somewhat limited knowledge in MS Access, so my data may need to be structured differently as well. The data that will feed in to this database is coming from another Access database, so I really need to keep this based in access too. If interested, message me for sample data.