Most contacts you had in Outlook should have been migrated to your Google Contacts list. Outlook distribution lists should have also been migrated, they will appear in your contacts as a label. It is recommended that staff use Google Groups to create shared distribution lists.

To access Google Contacts you can:

In any web browser go to contacts.google.com.
OR From Gmail and other G Suite pages, you will find the Contacts App in the launcher at the top right. Click the App Launcher Select Contacts

Resources:

Google Learning Center: Get Started with Contacts

1. Create contacts and contact groups
2. Email contacts and contact groups
3. Organize contacts

Google Help Center: Edit or Delete Contacts