Well, first of all, welcome to DV! You've come to the right place!

From what you wrote I can see you've really set your mind to lucid dreaming. That's great, and essential, but you need good recall to remember being lucid. You might have been lucid last night, you just haven't remembered it.

First of all, I recommend starting a dream journal. You can create a digital one here on DV or keep one on your phone or in a notebook. Upon waking up, write down every snippet of dream you remember. Try to move as little as possible, keep your eyes closed and wait for things to pop up. Once a word, concept or image comes to your mind, focus on it and more will usually follow.

Write the things you remember down in as much detail as possible. When you start recalling so many dreams every night that it becomes too time-consuming, you can start writing down key words or only recording the dreams you find interesting, but at first I think it is best to write down as much as you can.
During the day, try to remember your dreams a couple of times (without looking at your journal of course). Also, before going to bed, read through it once.

Something else that works amazingly (not only for recall, but LD'ing in general) is Wake Back To Bed or WBTB. This method has you waking up 90 minutes or so before you normally wake up, you stay awake for some time and then go back to bed. It increases your chances for lucidity since at this time in your sleeping cycle you will enter directly into REM sleep.

Above are some things that positively influence your recall, but they will not yield great results if there are other things harming your recall. Alarms can be especially destructive for my recall. They can just smash the whole dream/sleep vibe out of your head. Try to wake up naturally or with a smoothly rising alarm that doesn't jerk you awake.
Also, a consistent sleeping schedule is quite important for recall, as well as not being too tired.

You can find much more information on everything above throughout the forums, but I hope this can get you started