What's the worst?

As long as you do something and contribute on the work to be done, you are not the worst. 

You can not knowing lots of things, but you can't not asking and remain don't know. 

It's always the worst, if you stop moving on and trapped yourself in the darkness. 

Though it's hard, but try to take the courage and move forward.

The crucial factor may be

the motivation to strive for the best.