Look around the forum for more info about eyes twitching. It has been discussed. I think sleep mask would help with keeping your eyes closed.

Any sensation you are experiencing is a part of falling asleep process. It happens every time, but we don't notice it, because by then we are asleep. Try to push through it and you will get closer to WILD. And even if you move, you can continue with your attempt. It should take you few minutes to get back on track.

Never had tingle, but I get vibrations just minutes before I enter dream. So you were very close.

SP is something you either experience or not. Most of the people don't. So waiting for it, or making it a certain point in your attempt that you need to get to, or get past, or experience, is detrimental. Same thing with other sensations. Most of the time I get vibrations and always I get the acceleration feeling. But sometimes I get falling, or floating, or sound, or something else. So every attempt is pretty much different from the other. If I waited for a specific one, I would give up a lot, thinking it's not gonna happen, because I didn't experience that one sensation I thought I should have. Hope this makes sense. Please do ask, if you have anything else. Happy dreams