Recording with focusrite 2i2 and sm57

Hey guys quick question for you. I recently picked up a focusrite 2i2 interface and an sm57. I want to record some instrumentals on my tele through my AC15. I realize I’m working with budget equipment, but how do I get the loudest signal with the lowest noise/hiss? I’m recording jazz/blues/mellow stuff. Here’s what I have so far. I’m happy with the way it sounds, but it’s just too quiet.