Yes. A demo account can help you to learn easily.

just read a book about forex knowledge and start to try

by books , by website etc...

you can use demo account.

Frist step you must use Demo account. and next step learn from your expreriance.

Demo account. You can do it.

Google!!

There is always a simple way to learn new things. However, the problem is we make it more complicated. The reason why most of the Forex broker companies have demo account for free is to train us before opening a live account. And some of us never use the resources that provides by our broker in order for us to acquiure more knowledge.