Just a few nooby questions

quote flobbadob

So i recently got dragon age 2, ive never played a dragon age game, but i am experienced with rpgs. So heres the questions (probably more than a few XD).

1. Im currently playing a 2h weapon warrior, for attributes im putting 2 str and 1 const per level with the occasional level where i put all str. Is this okay?

2.Also, for rogue should it be 2 dex and 1 cunn per level, or do they need other stats too.

3. For mages is it 2 magic and 1 willpower/constitution (alternate)? These are just the things im doing at the moment with my party so i just want to know if they are ok.

4. For any character class should i be trying to focus on 2 skill trees, or just try to perfect one. For my 2h warrior (im like, level5) im just focusing on the 2h wep tree, which other tree's should i use, and which ones would be beneficial.

5.I dont really understand how to use the tactics wheel, i know it is similar to mass effect 2 (which i have played), but i cant really use it properly.

Here are the questions in a shortened format
1. Attribute build for warrior?
2.Attribute build for rogue?
3. Attribute build for mage?
4. How many skill trees should i try and focus on and what other tree is good for a 2h warrior.
5. How to use the tactics wheel, tactically?

Please answer any you can, or direct me to some sort of guide which might have some faq's.
Thanks for reading (or attempting to read ) and just answer a couple if you can, it would be much appreciated.