If you go to our site, just click on a chat icon on a right lower corner of the page - this will open a conversation with support and create a ticket.
Alternatively, you can email to firstname.lastname@example.org
Overall, I can already tell you that even if you create Custom Field to all the modules in the Project, the value entered in one entity will not transfer to other entity, even if they're related.
For example, you have a Test with "Section" field value "1". If you create a Test Set with this Test as an Instance inside, the value of a field "Section" in the Test Set and Test Instance will not be "1" automatically.