It depends on your attitude.
Very few players do not listen to advice/alerts coming from allies. Often, when people like neon and fireman complain that newbies don't listen, its because they are not talking to them in the right way.
From the perspective of a new player, you won't be listening to someone who just goes "idiot" and "stupid allies" all day instead of telling you what you did wrong. And even doing that once will lose you enough that they won't listen to you later when you do give advice.
If you demonstrate you have the patience to listen and you know their limits, I find people are very willing to listen. No point asking a new player to do uber-micro like kiting rapiers with avengers or stealth missions; other traps include the bombs and often the entire plane factory.
Give them clear and simple advice. (that's enough nanos, don't build a pylon/anni, get glaives and 1 zeus, retreat from this area, attack with me)
Know that the game is a new thing and threats are everywhere, they will be inherently cautious or overly reckless, often both at the same time.