Here is what you need to say to your parents:
Mom and dad, I love you and appreciate the sacrifices you have made in raising me. That being said, whether I dedicate my life to Jehovah is entirely my own decision and one I do not take lightly. I can't do it for you, I can only do it when it is in my heart and mind to do so and when I am ready. If I did anything else I would just be living a lie, and you did not raise me to lie. Jesus did not get baptized until he was thirty and his parents did not shun him, so I think you can be more patient. If you choose to shun me for not choosing the same religion as you, well that is your choice, but know that it is you who would be choosing that, not me, I will love you no matter what. You had the right and choice when you were young to choose your religion, I am simply asking for the same right.
As far as your friends, getting baptized might make a difference, and then again it might not, but it would also put you in the sight and control of the elders, there are higher expectations and tighter controls, so think about that. In my experience being a young adult and finding friends is always hard, you might shorten the process by getting baptized, but then how much would you have in common with them, since you don't actually believe? The further you go on that path the harder it will be to ultimately break free, you might them find yourself married to a JW girl with children and thirty years old and stuck. Don't limit yourself.
Is there an interest you have that you could explore online and possibly meet others that way? Music, or art or something like that? My son found his wife that way. Please don't limit yourself, you are young and can do anything in life, as long as you don't give in to the temporary pressure.