I have been playing guitar for about 6 years, even though the first 1-3 years were mostly just messing around, then I self taught using youtube, then got a teacher for 1-2 years, surpassed him, and have been continuing to improve by myself. Though I think the guitar was obvious
A few months ago, I started violin, and love it, though it is hard to find time to practice. But I laugh when my friends say it is an instrument for girls, and is limited(hasn't anyone heard of Lindsey Stirling?).
Now I have like.. 4 people who want me to teach them to play the guitar, my dad, brother, and two cousins. Honestly, I am afraid to teach them since they will kind of learn my habits(since I can't bend one of my thumb joints, I kind of improvise sometimes, and hold my guitar funny), and I have never taught anyone. But I did get to work on my brother's left handed Les Paul a few weeks ago

and that was cool, even though he is missing a nob and I have to find a replacement.
I also am considering a third instrument, one that I can teach myself for a few years. But it is cool since I play violin and guitar, one of my cousins is learning bass guitar(no amp so he has no idea if he is good or not, the two cousins mentioned above are his sisters) and knows a bit of piano, one of my cousins who wants to learn guitar knows a bit of piano, and the other one who wants to learn guitar is learning the flute in school and teaching herself piano.
I love to talk about music by the way