I would like to give advice to you new players also.
First try your utmost not to die, this gives the enemy $$$ and each death speeds up the game loss.
Secondly go for the armor with + xx per second health, same with hats for MANA. The % per second ones are not as good.
Next learn which stuns do what and how.
For example the Unclean beast stun is very easy to use, instant. Verses an Erebus stun which takes a second and a bit to "charge". The UB will easily interrupt an Erebus stun every time if you quick about it.
The Rook stun is great, stuns multiple DG but you can easily miss.
The Sedna "stun" is not stunning players really, but stops them using their ability, EG interupt the Erebus stun.
Once you learn all the stuns and how to counter, use them to your ability you will tend to die a LOT less, the rest of the game is just picking favor items that play to your play-style. And some quick thinking.