Hi Dear,

It is absolutely fine, if at the age of 21 you are not able to achieve much. You still have a lot of time to do god in your career. The most important thing is that you should not feel shy or embarrassed because of this. You have pretty much time to achieve much in your career. Give yourself time. Decide what you want form your life. Which field you want to go in and decide a right career option for you based on your interest. Once you choose your option then work hard to achieve it. You have your entire life and you are not alone who is not settled at 21. There are many more students like you who are older and working hard to achieve their goal or find a right path for their career. Don't loose hope.

Good Luck