Please help with installing PostgreSQL in a Django project on Linux Mint "Uma"

I installed postgres like this:, - sudo apt install postgresql postgresql-contrib - sudo systemctl is-active postgresql, returned active - sudo systemctl is-enabled postgresql, returned enabled - sudo systemctl status postgresql, returned active but when I try confirming if the Postgresql server is ready to accept connections from clients as follows: - sudo pg_isready, this returned /var/run/postgresql:5432 - no response. I've tried all with no success please help, thanks in advance. OS: Linux Mint "Uma"