Once you've got Simple Invoices installed on your system (refer Installation documentation for more info) all you need to do is enter a Biller ( this is normally you or your organisation) details, a Customer (the person your are invoicing).
Once these 2 pieces of information have been entered you can now start creating invoices.
Note: If you are creating invoices based on products sales( ie a computer store) you will also need to enter some products into Simple Invoices
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