Treat trading like your own business, and in business there are also some risk/losses that you have to manage(e.g. rental of space). Similar in trading, we are unable to know when the profits are coming, however we know for sure what our cost/losses are going to be when we execute the trade.
Losing is part of trading and as traders we have to learn how to accept losses. Always allow yourself to have a peaceful mind when you trade, NEVER allow any single loss to bother your daily life.
If $1000 will worry you, risk lower. If $500 will worry you, risk lower. If $100 will worry you, risk lower. If $50 will worry you, risk lower. If $10 will worry you, you are not ready for trading, stay away and build up your capital. we also recommend not to try on demo as it will entice you to trade live.