My govt is bringing a law which will allow them to intercept any digital communication done by citizens under the pretence of 'national security' without proper proof and take control over ISPs

Not naming what country I'm from but a quick search can let you know. Anyway, I'm an avg Joe Software Engineer and I really have nothing to hide BUT I'm not gonna allow ANYONE to just come and look through my stuff! I want to be able to protect my digital privacy and want to take steps to strengthen it further.
Looking for any suggestions about what more can I do to ensure no-one sniffs around my business.

avg communication control digital engineer hide intercept isps law national national security nothing privacy proof search security software software engineer under