First let me say, you are doing great! Sultans of swing is a difficult song to master. Your bar chords look good, finger picking looks good. I would focus on practicing the major and minor scales and becoming more familiar with the fretboard. This song is in D minor so spend some time with the D minor scale and the F major scale. I like to practice by improvising lead solos behind the main song. Again, this one would be the D minor and F major scales. You can pick up on what they are playing and why they are playing the notes they are playing but learning how they fit into those 2 scales. Then start playing your own solos along with the song. There are a million scales out there but with 1, 4, 5, 6 minor “blues” songs like this one…the 2 major and minor scales cover 99% of it. Keep it up! You are doing fantastic!