I would not recommend that you introduce yourself by saying something like "Good morning. My name is XXXXX, and I am a highly motivated student". There should be plenty of opportunities later in the interview to talk about your motivation - and to specify exactly what you are motivated about. For example, just saying that you are a highly motivated student could mean that you are highly motivated towards staying in bed for as long as possible.
Incidentally, your title for this post should read something like Is it appropriate to use "I am a highly motivated student" as an introduction.
Also, do not use expressions like "Esp", and "highly motivated" is two words, not one.
Student or Learner