>>531224953
You could sum Rance 1 as "Lia is evil, Rance rapes her, and since she's insane she's now in love with him. Kanami is also there." and miss absolutely nothing.
Similarly, you could sum up Rance 2 as "Bird and Suzume exist. Rance also exists, and their lives are worse off for it. Maria is also there."
Basically nothing important happens in those 2 games and neither is very good so you don't miss much by choosing to start with 3, which is the actual first Rance kamige.