I play the following instruments:
- Piano
- Synthesizers
- Bansuri (bamboo flute)
- Guitar
- Hulusi
- Didgeridoo
- Native American flute
- Khomus
- Various gongs and bells
- Various percussive instruments
- Trombone
- Probably a few others too, but never really developed voice as an instrument, though I can of course sing in general.
I've found that as you understand playing one instrument, it doesn't take long to pick up another. However, when it comes to the bansuri, that has been the most challenging instrument to learn, taking years to learn which is much longer than other instruments. The more I develop my skills on this, the better I am able to play other instruments, like the piano.
So expand yourself. Learn more than one instrument, and all your playing will improve.