It's extremely difficult (though not impossible) to do WILD right when you go to bed. It's not at a very good time in your sleep cycle either. You've still got about 90 minutes to REM. Theoretically, you could do it, but it's really not going to work.

If you're getting to paralysis, you need to continue to let it happen. It's tricky trying to balance awareness with falling asleep, but you still need to let your mind fall asleep while being just aware enough of the process. You can't focus really hard on WILD. You'll keep yourself awake and you'll just fall asleep normally. You haven't said anything about HH, so I don't know whether you've run into any or not. A lot of people get them in varying degrees, but I myself don't get much.

HI and HH are usually good signs that you're getting pretty close to a dream. You need to let them happen, but don't try focusing too hard, that can chase them away. Soon enough, they should transition into a dream. I can't tell you at what point that you should go from HH and HI into a dream, since before, I just "knew" when I DID have HH. Don't force yourself in any of the process.