You have been taking classes consistently and social dancing for about 1-2 years*. You have been introduced to terms like connection, musicality and improvisation. Solid Lindy hop basics (lindy swing out, lindy circle, Texas Tommy, side-by-side Charleston, and tandem Charleston) are necessary. This level is about solidifying as a Lindy Hop dancer and improving your lead/follow skills, connection, improvisation, movement and musicality.
You will take classes labeled: Solid Fundamentals, Intermediate-Advanced
*Time frames are only an approximation. Being a good match for the skill description is far more important than the length of time you have been dancing.