The best training is trading real-life (no DEMO or something similar).

If you find the right platform (which allows trading in small amounts, and doesn't require additional funds or maintenance margins), it is recommended that you start there.

The emotional part of Forex trading is very (if not the most) important. You can never practice that in DEMO. When you trade with your own money (keep controlling your risks!!!), you have the best practice.

Important: Always use STOP LOSS; never be too greedy; never "fall in love" or "take revenge" of a Forex position.

Good luck !