I would recommend starting with SBT templates, and I second the recommendation of Scala for the Impatient.

We began working with Scala very slowly, only using it for small internal projects until we were more familiar with the language and stack.

We also avoided heading too deep into category theory territory in the beginning. Libraries like Cats and Scalaz are not allowed (currently).

There's a Coursera specialization on Scala[1], however it seems to focus more on data analysis than web development.

[1]https://www.coursera.org/specializations/scala

I didnt think the Scala Coursera was very good for general developers - a bit too academic and focusing on functional / recursive patterns which aren't a good way to get a feel for the language in everyday web usage (vs Php, Java, etc).

I'd recommend the book 'Scala for the Impatient', tutorials and projects from Twitter, and Maven or SBT template projects.