Travelling to Minmus
From Kerbal Space Program Wiki
Travelling to Minmus
In this tutorial, I will be teaching you how to get to Minmus. It doesn't seem like it, but it is easier than the moon due to lower gravity and the oberth effect (when the burn at periapsis is easier due to orbital eccentricity). The fact that it is far away gets negated by the oberth effect.
Building
The minmus spacecraft is similar to the mun and consists of 3 stages.
Upper Stage
The upper stage should consist of a pod (i prefer mk 1 due to lightness).