Can someone explain the movie 🎥 Inception?

Ok I finally seen the movie Inception which was great but I was a little lost.  I got the plot of the whole story itself down but the ending and one particular scene kinda had me confused.  Ok they all went to sleep on the plane (starting point) but it made it seem like they got off the plane and went into the van where Yusuf is awake 🤔.  I don’t remember Yusuf on the plane but he had too be on there.  Was that reality for Yusuf or was he actually in a dream where everyone else was in a dream within a dream.  Basically the van scene made it seem like it was reality and the whole time I’m thinking they left the plane but obviously from the ending that was never the case.   Also there were 2 Browning’s right?  The one Eames pretend to be and the one Fischer drew from his self-Conscious.    Man I hope I made sense writing this out.