Staying positive and patient helps. It could take months to start having lucid dreams, and many months more to have them with any regularity. But it is worth all the effort.
You can learn and gain experience from each attempt, even if the attempt is not a whole success.
Since it sounds like you are having some progress with WILD, you could continue experimenting with that, trying different little things to see what works for you. Or, since you are feeling discouraged, it might be good for you to take a short break, for a week or a few days. Or you could experiment with another method for a while.