What changes are possible on scheduled launches?

Product Hunt Noob here 👋, I'm preparing for an upcoming launch and have a few questions that are unclear in the FAQ. Apologies if they are answered some place else but I couldn't find it. - The URL says product URL (and doesn't seem to be changeable after you start the proposal). Should the URL be the regular domain or a specific subdomain created for the product I'm launching? FWIW In the future I'm planning to launch more products under the same brand. - What fields can be changed after the launch is scheduled? E.g. is it possible to fill in a first version, schedule the launch, share the link with supporters and then update parts of the launch (e.g. description, images, videos)? - As I'm a solopreneur, there is always the risk that I've to postpone the date on short notice. Is it possible to postpone the date? Any limitations? Thanks a lot for your help.