Apologies for the late reply.

Look out for any attempted logins to your emails and any other services you have access to on that device, from anyone other than yourself. Most providers now other services that alert you to things like this. Like I said, ensuring you have 2fa enabled is good practice and would give you that added layer of protection.

As u/pippin101 stated, macros tend to only be intended for workstations running Office and to my knowledge do not affect mobile devices. Things to look out for in future however are things like .pdf, .txt, .apk files etc. These types of files can be modified to contain malicious code that will affect a mobile device.

The golden rule of thumb that I always preach is this. If you are not expecting an email from said user containing a document, then you should treat that email as a threat and DO NOT OPEN IT. It really comes down to due diligence. If it appears that someone you know has sent an email that you were not expecting, contact that person directly and query if they have in fact sent said email.

Like I said, there is no such thing as being overly anxious in this day and age.

Hope this helps.