Adding a Node to Hyper-V Cluster

Hello All.............I am running Private Cloud (Infrastructure as a Service) in my environment with Hyper-V Failover Cluster and Windows Azure Pack.  There is Remote Desktop Gateway in place as well.

I want to add a node to a Hyper-V Failover Cluster.   What are the things that I need to consider before adding a node to the Cluster?

VMM Agent?

RDG Certificate?

I would appreciate if someone could guide me through it as to what I need to keep in mind before adding a node and how I should plan it and do it.  Thanks.