First things to do after installation of raspberry pi OS

Make sure the internet connection to update old packages by blind period between time to make official OS and current status.

# sudo apt update; sudo apt full-upgrade

In order to reduce sd-card usage down as much as possible, in my case these commands may be helpful after installation.

# sudo apt purge libreoffice* thonny* smartsim* scratch* sonic-pi* wolfram-engine* geany* mu-editor*
# sudo apt autoremove
# sudo apt clean

then, to fuse firmware is needed to improve the performance of your raspberry pi.

# sudo rpi-update