The Looks are relatively easy once you get the hang of them.

First, have you checked / adjusted the tension setting. Not familiar with your exact pedals, but most Looks have adjustability.

As for unclipping, its a matter of just rotating your foot. Imagine a line going thru the ball of your foot, the cleat and the pedal. This is the line you want to rotate about, swinging your heel outwards, away from the bike. Some people find it easier to swing the heel in. Don't raise your heel up when rotating, in fact it might help to press down on the pedal slightly.

Start out with your dominant leg, which for me is my left one (right handed). Unclip with your leg fully extended. Once you get good at that, practice with the other foot and then learn to do it with either leg in any position on the crank.

And just a lil safety pup tip: Keep one foot engaged until your sure of your stop. Many a time I've been caught scrambling to reclip one foot when the situation changed, ie, light changed, something moved into my path, blah, blah, blah