Hello, and welcome!
You've purchased a HostOne Web Hosting solution, which has included a hard disk, website and e-mail allowance.
For further details of your package, check your e-mail.
How can I access my web hosting private area?
This will be done at each corresponding server, which will vary, depending on your purchased location. Check below:
HostOne UK - https://hostone-uk.cfld.uk:8443
HostOne Spain/Iberia - https://hostone-es.cfld.uk:8443
HostOne US New Jersey - https://hostone.cfld.uk:2222
HostOne DirectAdmin Singapore - https://hostone-sg.cfld.uk:2222
HostOne Premier CPanel Singapore - https://hostone-premier-sg.cfld.uk:2083
From there, you will be able to manage several areas and aspects of your website. Feel free to explore.
General rule of thumb
Always update your Wordpress website, if you have it;
DNS changes and propagation will take up to 48h;
Ensure your domain is always synced at the domain registrar with your new IP and new website service.
When you HostOne, you'll want to host more!