Haha I feel you. Knowing the scale is just step one. The difference between knowing pentatonics and sounding good is usually one of two things, or both. First, phrasing. Most people just run the scale up and down. That sounds like an exercise. Real music has space, repetition, and little rhythmic motifs. Try playing just three notes from the box, repeating some, leaving a pause, then answering with a different three. Make it breathe. Second, the notes you land on. The pentatonic has sweet spots the tonic and the fifth that feel like home, and the flat third and flat seventh that add the bluesy tension. If you drift without resolving, it sounds aimless. Same notes, different target. Third, feel and time. You can play the "right" notes stiffly and it will still sound like you suck. Play a bent note slightly behind the beat, let it ring, dig into the vibrato. Be deliberate. Grind the phrasing, not the scale. You already climbed the mountain, now learn to walk on it. Keep at it, laugh at yourself along the way.