"But I have been avoiding talking about what I'm doing now because it's frustrating for people to hear about things that aren't available yet"

John Frusciante is likely describing the fact that he is working on something new, however it is not yet readily available to the public. He knows that it can be annoying for people to hear about something they can not access yet, so he has actually been preventing talking about it. This might be a brand-new album, a new trip, or some other project he is working on. He is most likely attempting to avoid creating too much buzz or anticipation for something that is not yet prepared to be launched. He is likewise likely attempting to prevent frustrating his fans if the job is delayed or takes longer than expected to be completed. By not discussing it, he is attempting to manage expectations and prevent any possible aggravation.