I am also 20 and have PCOS as well as family history of hypertension and diabetes. I was never diagnosed with any of them besides PCOS but I know having the sleeve was the right choice for me. Last summer, I went through the entire process for the sleeve and was denied the first time for not having a high enough BMI. This time, I was approved by insurance and it was the best decision.
I can definitely relate to your fears about it being a big decision at 20. Even though I just had the surgery last week I can say with confidence that I am so much happier and know that I’m on the path to a healthier lifestyle. I am so glad I had the opportunity to do this for myself now and be able to do get a tool like this when I am young. Being in college, I know it won’t be easy but I definitely know that it was right! Good luck - you’ll definitely make the choice that’s right for you :)