I did not say it's too much i said "it's quite impossible".
I was the first to answer to your post but may be someone else can help you.

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but I would find it hard to start it all over again because of one reason. Dungeons ! They're frustraiting to me. Endless halls with same monsters over and over again and again.

Yep some dungeons are really awful !
IMHO the worst are Iona's dungeon and the sewers.
But if you play again the game you don't have to go through the complete dungeons again.
For exemple you don't have to do the lowerst parts of Iona's dungeon.
For the catacombs it's the same thing, you don't have to visit all the rooms and kill all the monsters.
With litle cheats like duplicating gold and potions, you can play the first part of the game very fast.
It's only my advice but wait for Raze's advice, he knows the game a lot more than me.

Barta