Greetings Ayrtonm... fear is probably the one thing that trips up most of the smart and talented people that try to get into this game. Fear is normal because market speculation is a world of uncertainty and risk, but most of us grew up being taught that there's an answer to anything if we work hard enough. Unfortunately, we can never be 100% sure of what's going to happen and how the market will react.
This means we will lose trades, (especially when we're just starting out), but less as we get better. This happens because we learn our mistakes, and manage risk in a way that our winners will be bigger than our losers...with work and dedication, we will improve.
So, just keep trading with demo, then to very small accounts when you feel ready. And the more you trade, the more you will improve your skills, the more you will learn to weather the losses, maximize your profits, and develop the fearless trader mindset.