Just keep practicing. The first few lucids are rarely stable. Mine weren't... lasted a couple seconds I think?

By focusing on the blinking, you're giving it the power of your expectation. You expect it to wake you up. So best to try not to focus on that. Focus instead on stabilizing the dream. You can look at your hands until they become very vivid, you can say your name out loud, and of course, interact with the sensory world around you.

Tips - if it become a recurrent issue for you.. first thing is hold very still, eyes closed, as you lose the dream. You can sometimes get it back, or get into a new dream. Next is, if you are lucid and stuck with your eyes closed (this has happened to me multiple times), you can use your dream fingers to peel open your eyelids. This has worked to regain the visuals of the dream for me.

Good luck and welcome to Dream Views!