I’m rating this a moderate difficulty due to the physicality. The cinder blocks weigh 35lbs each. And during the cleaning, priming and painting steps, you are working with them on the ground.
This makes it difficult to lift with your legs. After all, you don’t have much leverage because you are bending more than lifting and moving, which means you will be working your lower back muscles a lot.
It actually gets easier when you assemble the bench, where you can use your legs to do the lifting.
