Is being in your twenties scary??

Hi all, I’ve recently turned 20 and now classed as an adult!! It’s a super surreal and scary feeling to experience and I feel as if my teenage years went SO SO fast. I feel like I didn’t experience them enough and do the things I actually wanted to do. What are your 20s like?? I’m aware everybody has different experiences and opinions but I hate the thought of becoming older. Birthdays don’t matter as much to me anymore and every single year I find myself crying! No idea why but I just do. This year has been a major growing experience for me and I feel like it could’ve been one of the worst years of my life yet. I’m super scared to be entering my 20s now and hate the standards to it as-well