NASA finds Titan's lakes may be creating vesicles with primitive cell walls

I like the "vesicle first" theory because planar sheets of reaction can form perturbations, so getting from two surfaces mixing to complex shapes and enclosures feels plausible given any significant vibration or wave.

Once you have an enclosure you have potential for osmosis and other differentials across the boundary. It's not life Jim, but it's one hell of a building block/precursor.