Can you believe that I did not know what is an Invoice and how to prepare one?

Can you believe that I did not know what is an Invoice and how to prepare one?
Hey that is true , Honestly I admit .
I was 24 years old it was my first business in Long Island , New York. We delivered services to our client. As per the agreement I will have to wait for 30 days to get the money.
After passing 30 days I was excited & expecting to receive my first Income of $9600/- But did not get the money.
So I called the client during the call I bought up topic about the payment. That’s when the client asked me. Did you raise invoice?
I did not really understood what he was saying but acted like I know what he was asking.
I said No I did not raise Invoice, should I raise one .
Then the client said yes please raise invoice.
I said OK.
This was in 2002. I wish I used google those days like I do today.
I called a friend who is in Business, Asked him to share a copy of his invoice. From that I made my first invoice by replacing his logo with ours.
You Don’t Have to learn every thing to start. But you have to start Any how you can learn on the way.
So What is that you learned on the way either on the job or after starting your business?
Comment to let people know your journey?

Author: Krishna Lakamsani