Since you are part of the AutoML Vision Trusted Testers group, you have visibility to the unified UI. If you just want to import datasets and train models for Image Classification, you will have to access the legacy UI at:
https://cloud.google.com/automl/ui/vision
The unified UI should work for you without any action on your part, if you are working on Object Detection datasets. For Image Classification, you can use this unified UI only after you join the EAP. We will invite you to it separately by email. Later in September, we will open it up to all customers.
Thanks,
Sujoy