YugabyteDB and PostgreSQL share many similarities when it comes to installing, connecting to, and managing databases, including creating users, databases, schemas, and executing external files from the SQL shell. Installing YugabyteDB can be as simple as a few minutes on a single node setup, with additional options for multi-node installations and Google Kubernetes Engine deployment. Connecting to a YugabyteDB cluster can be done locally or remotely via JDBC, while setting up users is similar to PostgreSQL. Creating roles, assigning privileges, and managing user passwords also mirrors PostgreSQL's approach. Similarly, creating databases and schemas follows PostgreSQL conventions, allowing developers to easily transition between these two popular database systems.