Over the last 12 years or so, I’ve primarily learned new techniques on guitar through learning specific songs I like.
I’ve found that many people simply stick with a very limited number of songs that they enjoy listening to, they get in a rut, and quickly stop their progress because they skip songs with more complex chords and progressions than they’re used to.
One of the best ways to increase your playing abilities is to seek out those tough songs with new and difficult techniques, chords, changes, or solos. Push yourself by picking a hard song, and mastering it over days, or even weeks of practice.
Keep brushing up on your “playlist” of songs you can practically play in your sleep at this point, but always move forward too.