Hiya, and hugs lol
Asking anyone on the rota to sign a declaration of confidentiality should help you open up the conversation. Explain that everything that happens in your setting needs to stay in there and that if there are any questions, concerns or ideas for feedback your door is open & ofsted's number is displayed on the declaration - search the internet for more ideas
Confidentiality declaration
It may mean development records and other sensitive information needs to be secured & accessible in a place of privacy only to those with permission, and depending how far you want to take it a 'welcome to our rota pack may be good to ensure you have the opportunity to let everyone know expectations, timetables, drills, complaints, duties ...
Parental involvement policy
Are you planning a rota induction day to show everyone around, what's done where and how etc ?
for this xx let us know how it goes