If you continue to lose, continue to trade with the amount of money that you can afford to lose. It can be $10 or $20. Trade like you are expecting the least but with little amount of money from the total trading capital. If you have $20, trade with just $2 and continue to look for a better strategy that will help you.
It can take 2 or 3 years. You need to be patient. If you are not patient, it can result to losses of money. Do not think trading can be a source of income. It will only be a source of losses for such a person.
Do not borrow money from your friend because of trading. Use low amount of money to continue to continue to trade until you see something positive about it.
You have said it all sir, use what you can afford to lose, don't be in a haste to get it all at once , trading is a process you fall you rise till you can know longer fall hard again.
Constant practice and seeking for knowledge on your particular trade is key to success in that trade,when you now combine this with hard work, patience and discipline, the rate of success in that trade is now increased by a big percentage.
Start small, improve your understanding and general knowledge and the sky is just your starting point, while it's still very important to have a source of income while trading, because the market is not always favourable and you are not always assured of a win.