I struggle with beginning sounds a lot too, specifically 'hard' sounds like strong 'B's or 'G's. Basically any sound where you cut off airflow to make the sound gets me stuck a lot. That's the trick: cutting off the airflow. When you know a word with a 'hard' starting sound is coming up, get ready to ease yourself into it. You want to force the air to keep flowing, while still pushing out the sound. Try to make the 'hard B' a 'soft B', if that makes sense.