What should I do first after installing?

1. Add the cron job every 5 minutes.
2. Activate your license at System > License.
3. Fill in General Settings (company name, logo, pay-to text).
4. Connect SMTP and send a test email.
5. Add your server and create a product.
6. Enable Bank Transfer and write your payment instructions.
7. Place a test order, record the payment and check the service is created.

The full list is in the first steps checklist.