I took a look on these lotr rules, but it is largely based on D&D 5e. Thus it doesn't (or I have very bad eyes, since I can't find it) explain the core rule, like how fighting work and stuff. I never played 5e and don't want to buy the book just for that. Is there a quick, reliable ruleset around here ?
Also lotr rpg thread, I guess
>>54288532
https://dnd.wizards.com/articles/features/basicrules
>>54288532
If you want to run a LotR game and don't want to buy the D&D books, then just play The One Ring instead. Made by the same people as that module, but uses rules tailored for the Middle-Earth feeling rather than the abomination that d20 is.