First of all Welcome to SubSim
as BBW and JU said every SuperMod (GWX, WAC and NYGM) can be played in any difficulty level you like. That way you can keep increasing the realism as you go along without feeling scared by the game. I've started GWX at 30% realism and now I never play in less than 70% (I do not use Manual Targeting as well). Give it a try and you will see how easy it is to get it going.
Do yourself a favour though. Before you install ANY of the SuperMods play in Stock SH3 for a couple of days. Then install any SuperMod you like you enjoy the experience. That way you will see how much effort everyone has put into making the game so great
