I would like to know how similar is scRNA Seq analysis to normal RNA seq analysis. What are the additional steps to be followed in scRNA Seq analysis, especially during differential expression step?
They aren't very similar at all. That said, this support site is intended to help people with specific questions about Bioconductor packages, not as a source of generalized knowledge about various analysis methods. There are any number of manuscripts and blog posts as well as vignettes for the various Bioconductor packages that are dedicated to scRNA. You might start by reading some of those.