There are much more courses in Coursera related to GCP and relevant to the exam, as for the exam you will have to be able to select good responses in questions related to how to deploy and manage cloud solutions on GCE.
I recommend taking Cloud Engineering with Google Cloud Professional Certificate, I`m doing these courses now, and the course you have finished is part of this certificate.
Other certificates worth doing on Coursera platform related to ACE cert:
Architecting with Google Compute Engine Specialization
If you have a subscription on Qwiklabs, you can take Labs/Challenges/Quests/Courses there as well.
I found many of the labs are enjoyable, and learned a lot from them, while providing a state of the art knowledge.
Following the basic cloud documentation, there are many tutorials and example business cases to try out as well.
Basically, if you start exploring the sites you already use, you will find much more resources at hand.
If you are looking for other resources,
there is a repository created by sathishvj:
https://github.com/sathishvj/awesome-gcp-certifications/blob/master/associate-cloud-engineer.md
Udemy:
https://www.udemy.com/
https://www.udemy.com/course/google-certified-architect-developer-engineer-data-devops
https://www.udemy.com/course/google-certified-associate-cloud-engineer/
Linuxacademy
https://linuxacademy.com/course/google-cloud-certified-associate-cloud-engineer/
Acloudguru
https://acloud.guru/learn/gcp-certified-associate-cloud-engineer
I have signed up on the Udemy courses, but I mainly study from Qwiklabs and Coursera, as they are managed/in partnership with Google, and discounts were available, but I think it worths to pay for the content provided, if you can.