Okay ... you do know the waifish twink look is out this year and the corn fed farm boy look is the "in" look.
First off ... you're going to need to eat ... a lot! Loads of lean protein and carbs like oatmeal and sweet potatoes. Cut out A LOT of the junk food you eat. That will not help you gain any muscle.
Working out ... if you are in college, take weightlifting class! you get college credit and you will be around people with a variety of lifting experience. That's how I started and, at the time, I had NO lifting experience at all. But the teacher and a lot of the people in class were very helpful and obviously, I stuck with it.
If you aren't, read Mens' Fitness and Mens' Health. Those are amazing magazines to start out with. There are TONS of information for beginners, just like yourself.
Take notes of your progression and see how far you come along.
With your age, you should start to grow pretty fast!
One more thing ... it will take time! Most people want instant results and that is not going to happen. Keep at it; learn how to lift with proper form
and you will get to the size you want.