Which is Spark version supported by Fabric

I never tried the template snippets, but maybe they can be helpful:

https://learn.microsoft.com/en-us/fabric/data-engineering/author-execute-notebook#code-snippets

Here are some learning materials and exercise for working with PySpark, Dataframes, Tables:

https://learn.microsoft.com/en-us/training/modules/use-apache-spark-work-files-lakehouse/

https://learn.microsoft.com/en-us/training/modules/work-delta-lake-tables-fabric/

Personally, ChatGPT has helped me solve some code questions regarding PySpark, SparkSQL, etc.

And also Googling for PySpark / Delta Lake questions can provide answers. Many Databricks related PySpark / Delta Lake questions and answers can be relevant also for Fabric.