I agree with everything that's been said. and I'll add this.  u should practice glissade and passe revele facing the barre and holding on with both hands.  I began ballet classes when I was 7 years old and spent nearly 2 years doing the barre that way.  adult beginners should do the same thing.  and use the barre.  for a beginning dancer the barre is there for more than just balance.  it gives u the added strength to stay on ur standing leg.  u should hold it firmly (not tensely) and push down on the barre as u battement tendu, rond de jambe, etc. eventually u can wean away from the barre and hold it more lightly.

I read ur other messages.  it sounds like ur school is pushing u fast, which happens with talented boys who start late.  take my advice and install a barre in ur home.  practice the basics with 2 hands like I suggested.  u'll be amazed at how much it helps.