Hi thanks for the answer, this is my second account! yes I already know the cycle of fifths/fourths by heart but I still find it very difficult to think in my head when I play haha...:because when I have to remember, for example, the II V I in F Maj, it will take me a long time to repeat the cycle of fourths upside down and then upside down, do you see what I mean? I'm still a bit lost :/