Is it difficult to work with RapidMiner and R programming language?

Question

Programming languages

I liked the topic for the diploma, but I would like to know from people working with this program and programming language how difficult the task itself is in order to compare everything and understand. As far as I understand, there is RapidMiner, with which you need to make associations (for example, those who buy milk and diapers in Auchan -> buy juice, etc.), plus, you will need to add some things in the R programming language to implement given task. It attracts me superficially and I would like to do it, BUT there are few video lessons that I used to learn on the Internet in Russian, so I turn to you, how hard is it to master?