It would help if you do the WBTB(it would raise your chance of having an LD by maybe 50% i think) method before attempting to WILD. To WBTB(short for wake back to bed), you need an alarm clock. Set it to ring maybe 5-6 hours from the time you started to slept. After setting the alarm, sleep like what you normally do. After the said 5-6 hours, you will be probably awakened by the alarm of the clock. Now that you're awake, try to stay awake for 20 minutes(I normally stay awake for maybe 3-5 minutes then go back to bed). After 20 minutes, go back to bed and attempt to WILD. I'm sure it would be more successful.

For more clarifications/questions, feel free to ask