Kind of to add on to what Carbon said, make sure that wherever you go you have an exit plan that you can use to bail immediately and (hopefully) get away from the flank without taking damage. Having even a general idea of how to get out of an area will make your reactions that much quicker when your flank does start to fall, and it will save you that much more HP for use later in the game. Also, you never want to take damage for nothing, and you never EVER want to take damage for nothing early game. Be careful choosing what positions you try to take, especially positions that will require you