The typical initial timing advice is 5 hours after bedtime to attempt a WILD. So if you go to bed at 10pm, you should be getting up around 3am for your WILD. 6:30pm is already more than 8 hours after bedtime and your mind is very likely done with dreaming for the day. Everyone's different though, so experiment with a gradually expanding window of time starting around 5 hours.

In order to WILD only two things are necessary: 1) fall asleep; 2) maintain at least a pearl of self-awareness. Easy to say, trickier to master. So your job is to experiment with: 1) timing (both waking time and WBTB duration, from very very short [almost no WBTB at all] to rather long (30 minutes+)] to find what works for you; 2) a mental anchor to hang your awareness. Could be counting, could be a mantra, could be visualisation, whatever works for you (noticing a trend in this advice?! )

In my personal experience, the slow-falling-asleep experiences lead to the best lucids. But everyone's different. Find out what works for you (there it goes again!)!

And don't think a single failed attempt means a failure for a waking/WBTB time/mental anchor. WILDs are tricky even when everything is perfect, so give yourself lots of time to enjoy finding out ... all together now... what works for you!