A 30-day trial of Dynamics 365 for Operations is available through a simple sign-up with using company email.
Dynamics 365 for Operations Trail – Click here.
A Getting started guide that is included in the trial version provides a step-by-step task guide that lets you see specific scenarios in action. The product is available, so that you can explore and go through scenarios. Demo data is included to help make the product easier to use and make the experience more meaningful. A reminder email will be sent three days before the trial expiration. At that time, you can complete the purchase.
Hope this helps!!!