I was going to post something similar...
my car can get into all gears fine when its cold and hasn't quite warmed up all the way, except 1st gear.
It always happens... Getting ito first is fine when I first drive, but as soon as I get into the first stop sign in my neighborhood, it is reallly stubborn getting back into first.
Is this normal? It could use a trans. fluid change, so that might help...?