The most important thing to know when you start playing fiora ( especially in low elos ) is that you need to be super aggresive. Other players are often not aware of how strong fiora is because people misplay her. No one can win trades with you at level 1 since you have movement speed boost , true damage on your vitals and healing from vitals. Don't be scared to run into anyone as people below diamond have no clue how to play against her. Play her with ignite,because it gives you additional burst and you will melt everyone at level 1. Getting early kills is the key for winning every game you play , as you will be able to 1v9.