Hey slvr! Honestly, being only 16 it is probably a bad idea to get a streetbike. You should get a few years of driving experience under your belt first before attempting to learn how to ride in traffic. The streets are a dangerous place and you need to learn the nuances of street driving first. Take some time to learn how traffic moves, how cars and trucks react, how road conditions affect handling, things like that. But riding in the dirt until then is a great idea!! It will teach you the proper skills regarding the basic operations of motorcycle controls. Best to learn how to shift, brake, turn, accelerate, etc. away from cars and traffic. Do that for a couple of years and then take the Motorcycle Safety Foundation Beginner Rider Course and then get yourself a streetbike. Trust me, it is better to be patient in your riding career than to try to take too much on at once and get into an accident. I'm not trying to scare you away from riding, I'm just trying to make you aware that riding is dangerous and should only be attempted when you are ready and able to deal with the complexities of the road. Good luck!!
And in response to your question about the clutch/throttle work, yes you do have to balance the clutch and throttle like a car. If you have some manual transmission experience it will help a little, but not very much. A car and a motorcycle are two very different animals. What will make one purr with make the other roar ferociously. Get a dirtbike, it'll teach you all you'll ever need to know about how to use the clutch/throttle!