So much of bending and vibrato has to do with left hand finger strength and muscle memory, so this is a great thing to practice with the metronome. In this lesson I'll show you some ways to do this.
I hope you're starting to develop a good understanding of what it means to add expression and feel to your playing. You always want your playing to sound human and full of emotion, and bending and vibrato are some of the most common tools used to get there.
But before you can get it to be a natural part of your playing, you need to put in some hours on the physical side of it. So go back and forth between practicing the different techniques with the metronome and having fun with these tools in your improvisation.