Hy, sonix___!
It’s good that you started with RC but I would firstly start with DR. I think I don’t need to explain that… With good DR you can start with RC and then MILD.
I know your kinda impatient but you can try only with DR and one thing that many people underestimate: the feeling of being happy just to dream and to remember dreams also if you had any lucid dream the feeling of being lucid. Try to fall asleep with that thought every night.
About methods:
Like I said, building DR is crucial and you can start with RC and MILD. I would also suggest this tech!
Keeping DJ is the easiest way to find DS.
Triggers are very different from person to person, some may have trigger they lucid dream with DS, or something illogical that happened in a dream or just a moment of clarity. But the most common is RC.