louieakil I guess it depends on what you're trying to achieve. My suggestion would be to spin up an EC2 instance based on Debian 10, install your LAMP stack and then follow the Flarum installation guide.
You will need to secure & harden it, just as @[deleted] mentions, but for a reasonably easy 'test setup', so long as your security groups are ok you should be fine. I would not put it into production however until you've done this.
If you're looking for load balancers, auto scaling, etc, my initial suggestion would be to read up on Kubernetes (k8s) to see what you will be up against. Also consider using a RDS cluster for your DB, and perhaps Redis too. It is a major undertaking to get it right, but the benefits are out of this world.