Hi 20273, welcome to the forum!
Have you tried to combine WBTB with MILD? I’m not sure from your story, but if you have’t tried that yet, then do so. It was what gave me my personal beakthrough with LD-ing. You already have gotten used to waking up a few times at night, so these instances are excellent for this method. Try to experiment with the amount of time you stay awake (before going back to bed and doing MILD for about 10 - 15 mins). Alternatively, if you wish to persue the road to WILD’s, a method I kind of “invented” which brought me my first really stable WILD’s can be found here. Go have a look if you’re interested, and good luck with it!