Export the lasted version of the live site into staging environment.
Add and test 2 or 3 plugins for compatibility issues..
(test for malware) if all tests pass
export the new build with tested new plugins back to the live site.
17 Freelancer bieten im Durchschnitt $70 für diesen Job
yes, let's clarify the requirement in details also if you want us to share our skill and previous work let us know.. hope to hear you soon.. Thanks & Regards RIMSHA