is it safe or will I get virus if I open my yahoo and google mails on my macbook pro

Part 1 of 3

There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX  Foundation and Permission Limitation. 

The Operating System resides in a Sealed and Read Only Volume that can not be opened by the User nor by Third Party Applications.

The only Entity that can open and modify or alter this Volume is Apple.

Part 2 of 3

Security. Built right in

Mac app security enhancements

 The Built in Security  is all that is required to protect the computer.

Part 3 of 3

Opening a suspicious link from within an email is sometime a good vector to download Malware / Adware

There is Adware & Malware which will affect the computer and is generally downloaded from “ Shady “ Websites or Developers who Inject this software into the download.

Should “ Certain & Specific Software “ referenced from above be installed - it will negatively impact macOS. It is suggested, download directly from the Developer , the application Malwarebytes for Mac. 

It is free or paid for added features. 

Run the Application and it should remove the malware / adware. Once done, restart computer and test.

Opening an email will not install anything, even if opening it downloads something. The only way to put malware on your Mac is for you to actively install something. It won’t magically happen.

Good point 👍 made by @Barney-15E

The download would require the User ( you ) to purposefully Open the payload and Give the software ( Malware ) permission to bypass the Builtin Protection provided by the Operating System

The " Trick " is to know what to Trust and what Not to Trust