Songs like this subconsciously give you confidence. Confidence is the most important part of lucid dreaming because you receive what you expect. If you expect to fail you will yet if you expect to succeed you most likely will. Playing lucid songs before bed will allow you to remember to perform lucid actions (deilding, reality checks ect...) upon awakening (one of the best times). When it comes to helping with dilds its not as effective. The chances of dreaming of the song then becoming lucid is a lot lower...

Also good job for getting some songs... I myself know nothing about music and can't even sing/play an instrument. That song I posted was made by me using songify (it required no effort on my part... I simply spoke and it converted it into a more musical and catchy affirmation.