It's a compressed matrix format that you are looking at, rows are genes, samples are columns, but there is not much to "see" there for the human eye other than a lotm of integers and mainly zeros. In any case, by eye you are not going to run any analysis. As suggested already you should follow a guided tutorial such as Seurat or my favourit the extensive Bioconductor single-cell book https://bioconductor.org/books/release/OSCA/ to get started. Basically, you need to transform this into an analysis object, in Bioconductor that would be the SingleCellExperiment format, and then get analysis going, as e.g. described in that book. Does that make sense to you?