I have scanned and attached a document which has the complete details on performing Sri Lakshmi Pooja during Fridays and also Shrava Masa. This shouldn’t be confused for Sri VaraMahaLakshmi Vrata.
It has all the details from doing the Achamana, to Sankalpa, Dhyana, Naivedya, and Maha Mangalarathi.
It is a PDF document and is in Kannada.
P.S: It is very difficult to translate these in English, so I am not doing that. If you have any book and want to share, scan it and send it to me.