What you ask is not difficulty level OP, what you ask is a normal difficulty level... What we should actually have
That's the main problem of the game. Many people find it totally hardcore and others totally easy.
You have to know that BG3 is a game that has incredible cheats.
These cheats are nearly the only things you have to know (+ the basics of D&D) to beat it.
Just try to jump even when engaged to backstab your ennemies without any consequences, eat during combats, dip your weapons in fire, go higher, long rest after every 1 or 2 combats, use the surfaces arrows/potions/cantrip and sometimes a few barrels (they're funny) and you'll easy win.
That's what you have to do to beat this strategy game.
Is that a good summary ?
