The difference between installation for sqlite and postgres is the difference between typing `apt install sqlite3` and `apt install postgres`.
The actual learning curve for sqlite is more complex because picking random sql queries on the internet will end in misunderstanding in underlying types in sqlite and broken data. Postgres tools ecosystem is much more expressive, because more people think about Postgres as about "real" database.
The difference between installation for sqlite and postgres is the difference between typing `apt install sqlite3` and `apt install postgres`.
The actual learning curve for sqlite is more complex because picking random sql queries on the internet will end in misunderstanding in underlying types in sqlite and broken data. Postgres tools ecosystem is much more expressive, because more people think about Postgres as about "real" database.