Rotate object in direction of movement (joystick)

Hello, this is my first post here!

So, I have a Dualshock 4 controller and using the left joystick to control the translation of an image of a boat. I’d like it to face the direction it’s moving and can’t figure out how to do it.

My controller gives me two channels of -1 to 1 (x axis, y axis). Would it be best to transform this data to a 360 degrees or should I track the direction and use it as a reference? (how?)