Maybe I need a proper teacher. Since I originally decide to learn the flute by watching youtube videos. Apparently, my neighbors are super disappointed when I keep practicing for months but got no progress. Considering how poor my house's sound insulation is and how loud I play (I don't know how to play quietly, I mean, you can put something on the violin so it generates less noise, but flute? I don't know.)
@skyblond I recommend the electric Ukulele that can tap into your phone. My son, with no apparent musical ability, learned with this and is now quite good. No complaints. :)