As Pentaho DI does not provide a direct option to use Excel as an input to create data model and visualizations, I wanted to create a simple ETL process to achieve the same. I understand Instaview is also an option, but I want to do this using an ETL process. I am new to ETL processes. So need some help with creating an ETL process from scratch.
A link to some kind of documentation will also be helpful.

Thanks.