Hi! ok, im new and im lvl 12 :). A lvl70 player told me that its best to put talent points on demon now in the beginning, when im leveling up (?? am i not "leveling up" all the time, until im lvl 70..? lol), and after that put it on destruction. So - i chose demon now - ive put all my talent points there now. I dont want 2 be a pain in the --- 4 him and ask 4 more help about it, could someone here answer instead :)? Is it really possible 2 change into destruction later (do i have 2 unlearn demon talents then??) and when should i do it? Im sorry 4 being stupid but i think this whole talent thing is really difficult 2 get, as a new player...:)

First off I'll say this, yes you can change to any spec you want at any time, but it costs money, and you should only do it when you absolutely have to, especially if you're new.

Now the thing is, all 3 talent trees are viable.  I'm leveling quickly and happily as affliction.  The one I would least recommend for leveling to 70 is destruction, only because it eats through your nana very quickly at lower levels.

Demonology is often used for leveling because it powers up your voidwalker, which people use to tank and hold aggro, while you go nuts and unleash your spells.  It's the safe & slow way to go, which is why it's best for new people.

Affliction on the other hand is a little harder to control, because oftentimes your pet won't be able to hold monsters because you'll do too much damage.  To reconsile that, you need to use crowd control (cc) such as fear to keep yourself alive.  This is especially good in parties.  Affliction is the quick & risky way to go.

One of the bests pieces of advice I could give you though is to buy a wand ASAP and put it on your skillbar.  Once you have your dot (damage over time) spells on, such as corruption, fire your wand for some extra damage (it does a lot more damage than any melee weapon, and rarely fails to hit.  That goes for just about any caster though.  Hope this helped.

thank u so much! :)