How do I get help using this?

New to this. I'm in the USA, they tell me that we can only get MT4 in the USA. What is MQL? This is really confusing. I think I have a demo account but can't do anything with it. 

MQL4/MQL5 is a programming language which is used to create automated trading softwares (Expert Advisors and Indicators) to run on the MetaTrader (MT4/MT5) platform.

MetaQuotes company is not a broker, So it only gives you a demo account to work with and learn.

To start real trading you need to choose a broker that offers MT4 or MT5 platforms then open a real account.