Rolling Over to New Streaming Server

Time to officially roll over to my new W2019 streaming server from my W2012-r2 streaming server. I need to copy the current MariaDB database, to the new system, point ports in firewall to new systems, make sure those ports are opened locally as well. I am also pointing the IceCast relays to a new Linux Centos 8 server that doubles as my Zoneminder CCTV system and one of my Plex Media servers.