No, please do not upgrade your Mac to Big Sur yet.
Best is to wait until mid-2021, so software vendors can make their applications work with Big Sur.
We know, for example, that Sophos will stop working if you upgrade to Big Sur.
So please stay at Mojave or Catalina until further notice.
If you have any questions, please contact LPL Systems (or PIRL Systems or OREx Systems, as appropriate).