It's difficult to say anything without the specifics.
The game is based on D&D, which is massive. I found it helps a lot to look up some base game mechanics (most important stats for classes, some spells, and effects, etc). There are a lot of little things the game never tells you.
You generally want your most important stats to be even numbers
While all classes are great, some of them make the first few levels easier to bear than others.
Full spellcasters will most likely need a long rest after every 1-2 battles
Party composition is essential, my most effective party was the most unorthodox
You can reclass origin characters, and in some cases, it's even advisable, even if to redistribute some stat points.
Positioning party members can also make a huge difference.
Enemies do not scale, you will walk into fights you are under-leveled for.
Everyone has different preferences, I found the game extremely difficult with a sorcerer, but very easy with a bard.
