Bipes are a tad deceiving. This is from someone who may know the issues, but has yet to fly one himself, so take it with a grain of salt. The wingspans are shorter, even though there are two, the total wing area may add up to the total of a typical low wing plane. Here is the tough part. Because they are stacked, instead of one long wing, the plane has the ability to roll very easy, because the inertia is lower, and the wings act as levers, the longer they are, generally the more roll stability you have. Another thing is that because the wings are stacked, they are not as aerodynamically efficient as most low wing planes, so they tend to come in hot or tip stall easier. I would agree with the guys here, if you feel confident, get yourself a good low wing plane to move up into. It will give you confidence as you go and still be able to do aerobatics well. If you get a good glow engine or even a good brushless setup, that power thing will be a non-issue.
Have fun and good luck,
Curtis