Since this is all that Crystal does, I would open a new report and follow one of the wizards (I haven't used them in years). The 'biggest' piece of info you will need is how are you going to connect the database. You can have your app supply the data to the report directly, you can have the app set parameters in a report and have the report retrieve the data. You can build a stand alone report which connects to the DB and retrieves the data. If report is retrieving the data, you will need to tell it how to do that. I have used ODBC in the past, and you will need to create an ODBC connection to your DB, then tell CR to use it, after that it is pretty much drag and drop.
Hope this helps