You may refer the following video tutorial or read further.
The step by step instruction to register a new domain is given below. Please follow the guide.
1) Go to the domains section from your portal at https://my.interserver.net
Now, after clicking on the “View Domains”, you will get a screen displaying the information about the domains you have with InterServer. There you can click on the “Order Domain” button to place a new domain order.
This button will lead you to the next page where you can search for the domain names to see if it is available. You can also see the suggestions with different tlds (extensions). This will help you to find an alternative if the domain you are looking for is already purchased.
When you click on the “Register” link, it will lead you to the next page, where you can provide the personal details on the form in it.
3) Provide the personal information
In this page, you can provide the details like your email, name, address, country, etc. After providing the required information, you need to click on the button “Place Order” to finish the process.
How do I Transfer a Domain Name?
1) Please perform the actions in Step 1 in the above registration process and then follow the below instructions.
2) Start the Transfer
Now, you have clicked on the “Order Domain” button and located your domain. Now you can find a link “Already own it, transfer?” next to the domain name. You need to click on the link “transfer” as shown in the below figure.
This link will lead you to the next page with a form in it. You need to fill the fields, asking for your personal information.
3) Provide the personal Information
Please provide the details and click on “Place Order” button as shown in the figure when it is finished.
These are the steps to register/transfer a domain name with InterServer.