You have a great face and I would imagine that modelling could be a good route for you to follow as you are so tall and slim. This can also be a way in to commercials and can then also lead to agency representation for acting. You might want to approach one of the big modelling agencies? If you want to get acting work then you definitely need a photo that shows your eyes where you are looking down the camera lens. Have a look at Casting Call Pro. Every time you refresh a page you will get new profiles to look at. Have a look at the photos that grab you.
I would say that the main thing to change on your profile is your principal headshot. The photo is lovely, but it's not right for an acting headshot - we need to see your eyes
You can go to Storm models, for example without an appointment:
http://www.stormmodels.com/become-model ... me-a-model
It's possible that they won't accept models of your age - but I am sure that they would be happy to advise you.