First things first, your ever so helpful nonogram. It's got what you need.
That should help you sort through this to get your words for the ladder.
4687043851356807498045680642604256148950054205817162311154811546033200909410247081150107615124153210302114565151011511915121049921611212105021541458901239145711501201032145101500106615015471701306380183210654818015011750561105530178981323103228041451215011520011241655001064012501156504526132621017716115151620518408406021680543214581104680585608495158410214415607062151054818766054160051912866052510
So once you have your words, your ladder to solve, easy enough:
Text Version:
_ _ _ _ _ - Your first word
_ _ _ _ _ - Slow down
_ _ _ _ _ - Courage
_ _ _ _ _ - Serious
_ _ _ _ _ - Marks or Incline/Decline
_ _ _ _ _ - Open forest space
_ _ _ _ _ - Pleasure
_ _ _ _ _ - Drive with a stick
_ _ _ _ _ - Positive qualities
_ _ _ _ _ - Forests
_ _ _ _ _ - Communicate
_ _ _ _ _ - Invertebrates
_ _ _ _ _ - Paperwork to fill
_ _ _ _ _ - Unyielding to pressure
_ _ _ _ _ - Project from a gun
_ _ _ _ _ - Loss of job
_ _ _ _ _ - Your last word