I know that these aren't the answers that you want to hear, but unfortunately they are the truth. Everybody above has given out some good advice. Bi-planes take a bit more to fly than a single wing airplane. One noticeable difference is in the landing approach. With a "boxy" high wing trainer you can float for quite a long time, meaning after you lower your throttle to idle the plane will "coast" along for quite a long time. But with a biplane this isn't true. Because of the two wings biplanes have more drag and they will slow down a lot quicker than a single wing plane will. With a biplane you need to fly the plane down to the ground as opposed to a trainer which you can hold it level and it will settle down to the ground. Biplanes have a higher learning curve because of that. Even experienced pilots can have problems when they first try flying a biplane.

What Chuck said about the orientation of the plane is very true. Another thing that I see a lot is to a lot of pilots biplanes will appear to be a box. Because of the short tail and the appearance given off by the two wings the appearance of the bipe can take some getting used to. As with everything else in flying practicing will help with this. But for a beginner is may be too much to deal with all at once.

The last thing is the instructor. A lot of instructors won't teach a student if they don't have a good trainer plane. Some instructors may train you on an advanced trainer if the circumstances are right, but I would tend to doubt that any instructor is going to be willing to train you on a biplane. I know I wouldn't

Ken