I am very afraid of this migration. I see posts about "billing" yet we have a free account. I see posts about checklists not migrating. Is there a step-by-step process posted somewhere that will walk me through the process of migrating? Several of us all use the same board using our company email addresses. Will we all still have access to this same board once we migrate? What happens if I test the board by migrating first? Will my team members who have not migrated still have access to the same board? Most importantly, will all our cards migrate?