The download and instructions for the client are here: https://my.noip.com/dynamic-dns/duc
Could also Choose dynu.com which has a chrome plugin.
duckdns is also a free service.
https://www.youtube.com/watch?v=wCJjiHp0d0w use that
https://www.youtube.com/watch?v=ZKEGP_qBmxg and this to fill the gaps.
https://www.dynu.com/DynamicDNS/IPUpdateClient/RaspberryPi-Dynamic-DNS specific to pi