WILD can be tricky, especially for a new dreamer. That is not to say it can’t be done. I would not recommend trying it at the beginning of the night. Generally it will be more uncomfortable and take muuuuch longer. The easiest time is about 4-6 hours after you first go to sleep when REM cycles are closer together and longer.
Also, do not worry about SP. If it happens, it happens. If not, that’s fine. I’ve had quite a few WILD’s (about 20-30% of my LD’s) and only a couple came from SP. The point is to forget about your body so you can fall asleep directly into a dream. If you’re worrying about your body, you’ll never be able to fall asleep. Remember, SP is just something your body does as you fall asleep.
I actually have written this out in a more detailed article you can find here: [Making WILD your own (updated))
Hopefully that helps you out, and welcome to the forum! 