Hi Amber,
If there is any way you can have the surgery now, I would absolutely do it.
It wasn't available when I was your age and I didn't listen to my mom when she said "It's easier to lose the weight when you are younger".
Now I am a grandma and great grandma. I am having my surgery on 7/1 and I am so excited. My skin won't shrink as well at my age, but I will be glad to see my weight related problems diminish. Things like diabetes, high blood pressure, high cholesterol, won't be missed. But I am really looking forward to less weight and strain on my back, hips, knees, ankles, and feet.
You have so much life ahead of you. You will enjoy it more if you have the surgery.