Access Database Creation

I need to get a simple MS Access database put together to view sales information extracted from an accounting system we no longer use.

I have extracted the data into Excel files - and tried linking them myself - which seems to work OK - but I don't have the skills to create a database that can be easily searched to produce a report that replicates the information from the original invoices generated by the system.

I have 3 main tables which seem to contain all the information needed:-=

Customers
Sales Data - invoice header and totals
Sales Line Items - multiple lines against the Invoice header

The only common link I have found is the Customer Name - as the system did not generate/work on account numbers - plus invoice number to further link the Sales Data table to the Sales Line Items table.

In terms of reporting I need to be able to search for invoice data by customer name - and then by invoice date - and display the associated invoice data one invoice at a time.

I can send you an example of the invoices as presented by the old system - and the data tables.

Thanks
Les Smith