Advice for someone turning 20?

I’m turning 20 in a few months. I feel kinda depressed that I’ll be officially leaving my teen years and the next ten years will be dedicated to figuring out what I want to do and getting my life together. I guess up til now everything has just been laid out for me and I feel like I’m just floating by life. I don’t want to waste these years so do any of you have any advice for an upcoming 20 year old?

Also I wasn’t sure where else to post this so I posted it here sorry