I may get a bunch of stuff wrong in this post, but if I do, it's because I still don't know very much about you. Dysphoria is different from person to person but what you are describing sounds much like the flavor I had. I was thin at 6'2" and 140 pounds and my male bits were the only part of my body I was uncomfortable with. My dysphoria was the life I was living made me uncomfortable and I wanted to live it as a woman and not as a man. Because the hormones only had a mild effect on me, my body isn't that much different to day but I do have small breast and a little more shape
Before surgery I had a little less shape but I reached a point where I was pretty comfortable cross living. That level of comfort told me the dysphoria I had was over my life and not my skinny body.
To answer your questions, I suspect the blockers alone will help you by reliving the pressure in your head that is caused by the male hormones. Unless you desire a female shape, the female hormones should do little to alter your feelings. If I am correct about your desires, a transition is going to be the only thing that makes you comfortable as it's the life and not the body you are after.
If I am correct about all this, your anxiety level just went off the scale and other than the blockers that won't cause physical changes, there will be little you can do that will help you without your parents noticing big time.
Therapy will be very important as you need to determine what will make you comfortable in life. What I posted above is a good deal guesswork based on the fact you don't sound uncomfortable with your body. If you understand what you are uncomfortable with or what you want to change, let me know so I can eliminate some of the guess work and give you a better idea of what you are dealing with.
