Is it more difficult to learn French by Skype/ telephone?

No, it is the opposite because you are not distracted by anything around you. Moreover, all you need to do is listen, repeat or/and answer. The tutor writes notes down for you. You will receive clear feedback by email after each lesson to ensure that learning is made as easy and effective as possible. By this means, there is no need for you to write anything during the lesson. This is a communicative approach that ensures that you build confidence in speaking French from the very first lesson.