The advantage is the specialist will be able to give you more info on what is wrong and a primary care physician can only give you as much info as they know. Like if your arm was broken you would want to go to a specialist because they know about more and a physician if you have a common cold.
Answer: I'm on my way toward making a better life for myself.
Explanation: The highway can be thought of as a route where there are endless possibilities and a long way to go and the old dirt track means a place where there are no good opportunities and everything's not as good as it could be.