Yes it is simple.
As you say you have pretty much figured out *everything* about DataSet, then Datatable row/column access would be easy for you.
Dataset is a collection of tables (one or more).
myDataSet.Tables.Rows //0 for first table.
myDataSet.Tables.Columns //0 for first table
This should get you going.
Read all about the Dataset and tables in VB here: The Tables of a Data Set