This is a normal sbt project. You can compile code with sbt compile, run it with sbt run, and sbt console will start a Scala 3 REPL.
For more information on the sbt-dotty plugin, see the scala3-example-project.
I follow those links : https://docs.scala-lang.org/scala3/getting-started.html https://docs.scala-lang.org/scala3/book/scala-features.html
naming conventions : https://docs.scala-lang.org/style/naming-conventions.html