Question: things to do after installing elementary os hera?
Answer: Set Window Hotcorner. You wouldn't notice the minimize button for a window. ... 
Install Multimedia codecs. ... 
Install GDebi. ... 
Add a PPA for your Favorite App. ... 
Install Essential Applications. ... 
Install Flatpak (Optional) ... 
Enable the Night Light. ... 
Install NVIDIA driver metapackage (for NVIDIA GPUs)