Just because you are a "gamer" doesn't mean all games will appeal, but I feel strategy RPG players are going to have an easier time coming into D:OS than gamers from say a WOW background.
Anyways here are some pointers:
- there is an optimal progression if you don't want to face enemies higher in level than you. If you are just starting out its better to follow this progression. I recommend clearing the immediate area around Cyseal first before taking on Dietmar because it's just going to go get harder from there
the upcoming Evelyn fight is even harder
- you will be outnumbered often. Strategy lies in figuring out which target is priority and start the fight from that target
- environmental effects and friendly fire are part of the battlefield hazards. You will have to learn them. There is bit of learning by trial and error. If that doesn't appeal to you then you will have a hard time with this game unless you follow a guide
This game doesn't hold your hand and won't hold your hand. It's not a style that appeals to everyone these days