Hello there.
Welcome to the forum.

I hope you enjoy it here.
As to your question about itchiness, honestly, the trick is to ignore it. I usually do two things. First, I focus on the itchy spot. Just delve into that itchy feeling without scratching it for a minute. Often I find that when I let go of that focus, it lessens a lot. The next thing I do is then shift my attention to a different part of my body. So like, my toe, or my knee.
I find it's helpful to practice a relaxation technique before going to sleep, such as the "61 point relaxation technique" Laberge describes in his book,
Exploring the World of Lucid Dreaming. It won't prevent itching, but it does train your brain to hyper-focus on a single part of your body. That can help you learn how to ignore itching better.
I always view the itching sensation as my brain's way of tricking me. It wants to test me to see if I'm asleep before inducing the dreaming state. Don't fall for the test!
I also recommend shifting focus from WILD techniques to DILD technqiues. Although, some people might argue differently, I found DILD to be an easier approach when I was new to lucid dreaming. WILDs can be hard to achieve, even when you're not new to lucid dreaming. Some people find it easier than others. It takes a certain skill to develop, before you get the hang of it. I think that practicing DILD techniques first, or in conjunction with WILD techniques, allows one more success because lucidity is not just about changing states of consciousness. It is also about mentally recognizing a dream world from waking life in order to stay lucid. You need the mindset to go with the techniques, and that comes from typical DILD foundational practices such as reality checking, prospective memory skills, and building a critical reflective attitude.
I personally recommend reading a beginner's book on how to lucid dream. The best beginner's book I can think of is the one I quoted above,
Exploring the World of Lucid Dreaming by Stephen Laberge.
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