We know the Circle of Fifths as a chart that spells the 12 Major/minor key signatures, but it can also help you play comfortably in all 12 keys!
Here are two approaches you can use with the Circle.
When triads are easy extend to 7th chords, and work in inversions of chords.
With each practice session move to the next key. The design of the Circle gives you 12 sessions of Major, 12 minor (Natural, Harmonic, Melodic), and move around the 5 segments of the fretboard. Be creative, challenge yourself and the Circle of Fifths will keep you growing for a very long time.