I recently took up the flute. I love a new challenge and although hard at first, it is getting easier (only had two lessons so far). I will always put the piano first, but felt that after a few years of doing one instrument, it was time for another. Challenges are things which keeps your brain from going fuzzy and keeps you occupied and who knows where it will lead. Maybe a little band? I don’t follow any famous flautists but there are some very good flautists I have found online.