I’m curious how others learn new songs. For me I try to force myself to learn as much of it by ear as possible. It’s not the fastest way but it is good for ear training. I find that I can get most of a song this way but then there always seems to be one or two small sections, or even just one chord, in many songs that I can’t get and so for those parts I’ll use the internet (generally ultimate guitar app, sometimes YouTube).