How long does it take for a human body to fully fall asleep?

I have heard that it takes your body a complete 2 hours to fall asleep.

but im not sure of this information.

An average tired person should take between 20 - 30 minutes to fall asleep. If it takes you shorter than this, you're overtired and should consider changing your sleep schedule. If longer, consider exercising more or setting your alarm so you wake up earlier and have longer to tire yourself out.