My account websites & URL server transfer

Hey there,

1) How do I connect my URL to my account?
2) I have one URL-testing and one URL-active. On URL-testing I learned to use WP, my theme, RankMAth and son…now I am done with building my new website. In the next days I will transfer my URL-active from my old server to a new server and will then transfer URL-testing content via ‘WP all in one’ to my transferred URL-active (hope you understand?). Now, since ‘WP All In One’ is copying everything to the new serve place incl. the plug-ins, do I have to do something with my RankMath account?

Chris