Getting your hands on Unity is relatively straightforward. Start by visiting the Unity site at https://unity3d.com. In the top-right corner, as shown here, you will see a link to Get Unity:
That link takes you to the https://store.unity.com page where you can click on the Try Personal link as part of the Personal plan option.
You will be taken to the Download Unity Personal page. You should review the information on that page to be sure that you qualify for the Personal Plan.