Once you start to create a new cluster, you can select the system type and the max number of CPUs/systems/etc. After the required settings are in there, you can start your cluster, which will deploy a VM (the cluster head node above, i.e. the control/scheduler VM). You'll be able to SSH into the scheduler VM using a public IP which is where you'll run your execute commands that will send the job to the execute nodes. These commands differ slightly for each scheduling platform; here are some examples for HTCondor and Slurm. The image below shows an example of the required settings.