when running from one place to another, lets say in a village, try to know where you can hide.
run/sprint a few meters, then hide, check your corners, look for enemies. when its all clear move ahead.
always be ready to fire, dont just run around corners. try to explore the maps offline, look where the enemy is comking from, know the routes you can choose and know your spaces where you can ambush the enemy.
Most of the time i play as Infi. but as said before, you will die alot. sometimes i die 6 times straight in a row. last month i finnaly got my kill to death ratio into the + 1.12 kills per death