Hosted forms are our legacy feature only available to those who have previously created one. To create a stand-alone sign up page, check out our Landing Pages feature.
You can access your Hosted forms by going to the Lists section, choosing your list, and selecting the Forms tab.
There is also the option to redirect them to a separate link upon completing this sign up instead of displaying a message. All the changes you make are displayed on the preview on the right.
Once you have saved the changes to your form, they'll be reflected under the form URL.