Those who tell another a technique is hard are doing that other a disfavour as ones thoughts can really affect this stuff esp as LD is about working with the subconciousness and if a person thinks a method will be hard its then bound to be. Some actually may find WILD easier, it all depends on the individual. Some may be naturals at it, while others do find it hard.
To the original poster... well you are completely aiming for the wrong thing. One doesnt aim for a paralyses state with WILD, actually I dont think that is aimed for with any LD technique but rather can just be a consequence of all this. A sleep paralyses state is something one may or not experience and not necessary.
But even if i wait without full paralysis i can't fall asleep. I keep counting or concentrating on my breath but nothing happens. Am i doing something wrong again or is it about my relaxation at that time?
If you are half paralysing, obviously you do have a good degree of body relaxation going on. To me it sounds like you are having an issue with the mind relaxation... you need to relax your mind enough to start dreaming. That's the tricky part, letting it relax but at the same time being able to bring focus back in or not forget what you are trying to do. You are focusing so hard you arent relaxing your mind! (hence why you also arent falling asleep).
You didnt say how long you are trying this before giving up? Some of us find it can take around 45mins or so to hit the right state (while others of cause have it happen sooner). You may need to have patience ..
I suggest to try it for up to an hour and if you still havent been able to mentally let go.. tell yourself you will allow yourself to go to sleep (but then tell yourself you will wake up in a dream) and hopefully when you go to do that you will find yourself go into a WILD (which can happen without a break in consciousness).
Practicing meditation can be good for learning to let mentally go and allow thoughts to just start to flow while watching them. (I suggest to start to allow random thoughts to start to flow at times to help allow the dream to start to come in).
You could also try if you find it hard to drift towards sleep, to do this when more tired (that way the mind starts to drift into random stuff more easily even while one is trying to rein the mind back some).
Watching ones breath may be better then counting. (I can count thousands backwards and still not go to sleep.. counting is too stimulating on my mind and doesnt allow it to relax enough). Sometimes thinking certain words on the in or outbreath may be helpful eg you could think something like "I am" on the inbreath, "dreaming" on the outbreath... which would be far more relaxing on the mind then a count but still would hold focus.
Anyway.. your issue is not relaxing your mind enough (and focusing on paralyses).