Everyone learns different, but there is something universal in music that is essential to mastering an instrument. You should be able to hear something in your head and then play it. The goal is there is no barrier between your thoughts and actions. Learning to play by ear like that is the best way to get there in pretty much all instances. Looking up tabs is still great, and you can learn a ton from that (huh? another song with G, C, and D, I wonder why? Is it similar to the C, F, and G songs I'm playing?) but if you want to get next level that is the best way. I am a guitar play and I was in a band with another guitar player. I had a music minor, thousands of hours of practice and knew my theory inside and out. The other guitar player barely knew any theory but was way better than me and one of the best guitar players I've ever heard. He could just play. He didn't need to know the theory, he could hear it in his head.