Im glad you see youve found interest in lucid dreaming.
Dont get worried if you done all the right things and nothing has happened right away.
Some people have instant results. Most people seem to take about a month. But many people take much longer.

Most things in waking life can take alittle while to switch over to dreaming life
ex: When a person that comes to a new country and is able to speak both the language from his last country and his current one, after a couple weeks their dreams switch over to the new language!

I'd recommend you consider reading an ADA tutorial here in dream views. Because in the end its AWARENESS that makes you lucid.

Try these less passive mantras:"I will remember my dream" or even "Next time I am dreaming I will realize Im dreaming" instead.

Good luck and if you have any questions feel free to ask or send me a PM!