To be a good trader you need to do research and prepare yourself according to the advice of expert investors. You should initially choose the currency and buy a minimum amount to get a good idea of the market situation because when you have your own investment it will be easier to do your research and you will understand when you should invest and when you should withdraw.
no amount of research and preparation will make you a good trader if you don't go to the field and trade with real money
this is the thing... there are no shortcuts
for a trader to be good they need to start by watching a 100 usd bill to burn and do nothing
somehow the best traders can remove feeling out of their equations and make decisions based on rationality only... maybe mixed with a bit of intuition if they are really good
somehow it's about removing feelings, but you pay a price for that on personal life and relationships too