The website that it takes you to is the CoHClosedBeta website. Before it was Closed Beta, it was a secret fan server that used to go by Resurgence or Paragon. You probably had an account with them.
To migrate your old character from the old Paragon Closed Beta server to the new Closed Beta Vanguard server you have to log into your Homecoming forum account that you want to use on Vanguard, then log into the CoHClosedBeta forum account and follow the instructions on the link.
I was unsure if I wanted to do that, because I didn't remember what character I had there--I left that server, Resurgence, over 6 years ago. What I did was to follow their forum instructions to log into my old account--memories. I made the determination that, yes, I do want to migrate those toons. I then followed their instructions to flag my old Resurgence-Paragon-ClosedBeta account for future transfer to the new Homecoming Closed Beta Vanguard server.
Is it confusing? Yes. But it will be worth it to me to have the old characters easily accessed via Homecoming's CoH launcher.
