1: Until you know what you are doing, Buy all of your starter items. They are listed since its what you can buy with all of your gold you start with.
2: Learn what your character needs based on your playing style, If you have issues with life, start rounds with an HP regen ring (400 gold) If you have issues with mana, Get mana regen shit, If you use minions, USE THOSE DAMN AURAS!
3: Play randoms until you find a character that suits you.
4: Communicate with your allies and watch the fucking map. No sense in driving if you dont use turn signals or know where the other cars are!
5: Getting ass kicked by opponents who are pushing? Go in the jungle and kill wild monsters for gold until you can push further~!
6: Dont turret dive until you are at least level 10-15 Or have stun.