We have over literally over 20 Apple devices in our home (and on our network) and I am considering working part-time contract work online. I need to know what Apple recommends as the best cybersecurity for your devices? I do not want background apps being loaded without my permission, other malware / spyware or any other things that would compromise our systems &/or devices or information. Is there something that would be best for the MacBook Pros or something that could protect the network as a whole?

I am considering working part time online and from home. My potential employer will send me contract work from various other companies. One of these companies has asked for my UDID as part of an IOS project and I am certain this will not be the only one to request this information. Is this information something I should protect and not share in this case or how would I know when it would be acceptable to share? What is the risk? How did I find it (current steps) if It is acceptable to share?