I am fairly short. Will I be able to see clearly?
height does not pose much of a problem with visibility in a modern vehicle.
In most vehicles now not only the seat but also the steering column are adjustable to the height of the individual.
I have come across pupils in the past who were short enough that they still had problems seeing clearly through the window (which we insist upon of course) even with the seat fully up and the steering wheel fully down.
The obvious answer to this is to bring a cushion from home for your driving lesson. This is a simple remedy but it works very well.
The main concern about height for most pupils occurs when reversing. Once you understand the necessary techniques that are available height is no problem at all.