RE: Biplane as second plane
The Dreamer bipe is VERY small. Unless you are proficient at close in flying with an extremely "loose" airplane, I would recommend against it.
FH Huber has brought up some very good points. Get familiar with a low wing tail dragger first. There are some differences between how high wing and low wing planes fly. The low wing plane will not be as self righting as the high winger, and will also roll more easily. Things you have to get used to before stepping up to bipes. The take offs and landings will be different with the taildragger also. Stepping into a bipe as a second plane will make it much harder for you to learn what you need to learn and not be constantly damaging or destroying your second plane.
Be patient and make the bipe your 3rd or 4th plane. By the way, my hats off to you for considering building a kit instead of an ARF. Way to go!
Fly and have fun,
Silversurfer