Welcome to the forums. Don't worry about your English it is better than most native speakers.

Make sure when you do a WBTB to stay awake for a while before you go back to bed. This will help your brain "wake up" so that when you go back to bed you have a higher chances of lucid dreaming. It usually makes sense to stay awake for around half an hour but you can experiment with the times.
When you are DILDing remember to use a variety of reality checks in real life.