I think what you are going thru is something most if not all of us go thru.
I can still remember my first week of college, I hated it. I didn't know anyone, none of my friends went to college right after graduating so I found myself "alone" even with all the support my family was giving me. I ended up ditching after my first semester, budget travelled for 5 months across Europe. That gave me some life experience and thought me about being comfortable alone and in a unfamiliar (sometimes dangerous) setting.
I ended up going back to school, having SOME life experience and most importantly being comfortable being uncomfortable.
The best advice I can give you is to focus on you and stop having this picture in your head of where you should be in life, comparing to others. Some will get there way before us and some will get there way after us. The main part is that you are enjoying the process.
Just like skydiving, some get skills right off the bat, some work hard(er), some give up, some persevere until they reach their goals, its all about the journey. Sometimes I look back and think "how the f**k did I make it this far with my life ?!" I remember it like yesterday and it was 14 years ago.