It's been almost 2 months since my last mini lucid dream

I was lying on the beach watching the waves. They were gigantic, and i loved the warm sand running through my fingers..

How is this happening? I cant even remember the last time i saw these kinds of waves, or been on a beach. I stood up and knew that i was dreaming, i did the nose RC and felt that luscious breeze of air float through.
Everything was so real, the sand, the water, the waves. It all had color and life, it was the most vivid lucid ive had yet.
I turned around and saw a giant Red Semi truck, i was instantly thinking of picking it up and throwing it or something random. Then i remembered that i was supposed to anchor myself, to the dream so i started thinking and it fucked up everything and i started losing clarity so i shouted "increase lucid vividness!" Nothing happend and everything went black..

Once again i was lucky enough to get a lucid but it only lasted for about 10 to 20 seconds.. I cant seem to hold my lucid's and it's extremely frustrating.