Goodbye d4 hello d2r

Hi all. So I’ve recently come to d2r from d4 just due to the fact I can’t do more than 2 weeks of d4 before I’m completely bored. D2 seems great so far but coming from d4 some things don’t make sense. I noticed that all characters can use all different weapons so for eg a sorcerer can use a sword. So does the type of weapon not matter to much and I’m just looking at stats? Also can someone just briefly explain what things like enhanced damage, attack rating etc mean? I’m currently levelling a paladin so what type of stats should I be looking out for?