Stageset includes the functionality to setup your personal domain in certain plans. To check if your plan is eligible, check under Team -> Settings and you should see the following:
If you don't see this and want to setup a custom domain, you best get in touch with us via the chat.
Now to setup your Custom Domain, please have a look at the following 3min video, where I take you through all the steps:
If this didn't work, feel free to contact us in the chat.
Best, Philippe