I find game easy with mod Easy Start. You get a lot of stuff at the beginning and it is easy to explore world. My characters are Thief and Hunter. Thief like in standard RPG games is best at using backstab. Hunter is good because you can find and craft many arrows with different abilities.
Getting Jahan and Madora I found best option, other two companions have classes that I already use. I find blacksmithing/crafting amazing option to save money. Having leadership skill at high level really helps.