How to connect ssh to my new cloud server?

I bought a cloud server instance with Ubuntu 20 Server to run my little homework page.

Not sure how to get it up and running.

I have an IP like: 123.456.789.123:22000

I have a user root and a root password.

I think I first need to configure ssh, is that right??

Quote:

ssh-keygen -t ed25519 -f ~/.ssh/my_cloud_ed25519 -C "my_cloud ssh key"

Then upload the key:

Quote:

copy key to web server ssh-copy-id -i ~/.ssh/my_cloud_ed25519 root@123.456.789.123:22000

Then login

Quote:

ssh -v -i ~/.ssh/my_cloud_ed25519 root@123.456.789.123:22000

Is that right so far?? I have never had a cloud server before.