- As others have said it before, BG3 is relatively easy to understand and you should have little problems if you have played other RPGs before.
The Pathfinder games are an example for a game where playing the game on something harder than story mode can turn into a doctor thesis about stacking different types of bonusses and such stuff.
They can be fun if you can do this but it takes much more learning efford just to get through the first dungeon.
- In fact it may even be good not having played DnD 5E before playing BG3.
They made some significant changed between this game and the default 5E rules.
Some people (including myself) do not like some of the changes.
So maybe you even enjoy the game more when you learn the (relatively easy) rules just by playing the game
Prof. Dr. Dr. Mad S. Tist 
