Orders are like invoices. They can contain multiple purchases of different types. One Community supports one-off payments, payments in terms and recurring payments. Start off with defining your products (and maybe even some discount codes?):
- Article: Creating products
- Article: Using discount codes
Now you can create orders using those products. Read all about creating and updating orders in the following articles:
- Article: Creating orders
- Article: Cancelling orders
Are you also using the crowdfunding platform? Then your products might be gifted to campaigns. See Creating gifts for more information.