Unfortunately, there is no simulator(s) for Meraki hardware. However, there is a fare amount of high-quality learning content that I would recommend and you can start with:
- Meraki Learning Hub https://community.meraki.com/t5/Learning-Hub/ct-p/hub
- Meraki Launchpad (https://cs.co/mlp) or Cisco Meraki Platform (https://cs.co/cmp) live demo environments
If you would like to explore read and write experience to a Meraki lab environment, please reach out to your Cisco account team and they might be able to reserve a self-paced lab for you.
Welcome to the simplicity IT world!