Colours into tones in B&W

This exercise represents my total frustration with this OCA course.  I have completed the exercise taking a colour picture (clothespegs) with a grey card (magazine image actually).  Put it into Lightroom and applied 4 filters to see 4 results.  Learnt a lot from this exercise but I don't know how to save each image.  I have had no lightroom training other than online stuff and forums and there is knowone to ask.  Forums are so impersonal and I really need a genuine human being to relate to.  I have made the decision that this type of course is just not for me.