My first lucid dream happened before I knew what lucid dreaming was! But after I learned about it online, and when I decided to consciously pursue it, it took me weeks. I think part of the reason was because I thought in the back of my mind I couldn't do it. It got to the point where I completely gave up sometimes as journaling didn't seem to help.

I think that the attitude you bring to the table may affect your success. At least it does for me- everyone's different!

But after I changed my attitude and started getting some incredibly vivid dreams, I actually succeeded. Within the span of the next several years after that I had many lucid dreams. However, I am far from an expert at it. The reason being I tend to go on and off with the whole thing. I get distracted easily at some points and stop trying altogether. But I'm back on the train now! Hahaha