The BIGGEST mistake and mindset of wannabe-trader is in thinking & believing that you can make fabulous amount of money in a very short time by trading the forex market. I TOO made that mistake and have, time and again, paid very dearly from that mindset.
All wannabe-trader should, right from the very beginning of their forex journey, develop a mindset to look at the forex market as another potential instrument/additional income for their INVESTMENT.
After reading & carrying out research on what the forex market is all about, practice on a Demo account (preset to actual amount of money you plan/intend to start a live account) to get the hang on how the trading platform works....which should take around 3-6 months and should be sufficient time for you to develop a trading system/style that best suit you (don't try to trade like other traders because what works for them might not work for you because you might not understand their logic & trading system).....then, if you consistently make profits through these months, start a live trading account with a well REGULATED broker.........and stay way, way away from exotic & Eastern bloc nation brokers.
Trade your own trading system and....very importantly.....add more funds into your trading account, when you have more spare cash, to build up the trading account over time. Treat your trading account like a fixed bank deposit account, BUT the interest generated by even the small daily/weekly/monthly profits WILL BE very much more than what any bank in the world will/can pay you.
If your starting capital is small (i.e below usd200) use high leverage (1:300-500) but trade in mini lots of 0.01 size and open maximum two(2) orders at any one time. An important item is to make sure your broker does not change the leverage over the weekend/public holiday (some brokers do that for their own protection against massive market spikes in the forex market).
And, importantly, never over-trade (open too many trade positions), practice good money management, be patient, never be impulsive, don't get greedy, have confidence in your OWN trading system/style.....but don't get over-confident and start thinking you simply cannot lost because you can and will if you start getting careless in making trades.
Lastly, try to keep informed on up-to-date on daily financial news especially on the currency pair/commodities/index/etc you are trading......and limit yourself to trading only one or two currency pair at any one time.