Congrats! You're almost there.

I think this is a good example of why it's difficult to WILD when you first go to sleep for the night. You can get to sleep paralysis and even stay aware through the transition to sleep. The only problem is, you can't go directly from SP into a dream. You don't normally have a REM period that early in the night, so there is no dream to enter.

Try this same thing after 5 hours of sleep, and you will hopefully find yourself in a dream afterwards instead of waking up.

Good luck.