@Justin Lee There are no complications. But we need to understand if you want to do a hybrid azure AD join for all devices.
Also, if you are using a managed domain you will need to sync the devices. But if you are using a federated domain then you don't have to sync devices.
Below is the articles on how you can configure Hybrid Azure AD join. https://learn.microsoft.com/en-us/azure/active-directory/devices/howto-hybrid-azure-ad-join
Let me know if you have any further questions. Please "Accept the answer" if the information helped you. This will help us and others in the community as well.