While taking bath and wearing the ehram I have made the niyyat of wajib as told by my elder brother, so is my umrah is in place or not?

Generally umrah is sunnat not wajib except one made wajib upon him by Nadhr or Ahad.
Ghusl is mustahab at all.if rest of the acts were correct inshallah Allah will accept.we are praying to Allah for the acceptance.