Liturgy of the Hours guide

I have been trying to learn how to pray the LotH every now and then for, maybe, two years. It annoys me so much for how confusing and hard it is to find information that clearly explains how to pray them. It’s one of the topics that get me flustered.

Please, where is a simple guide? Really all I ask is for a guide that gives the pages numbers and why they’re being used.

Maybe even one that gives the basic rules for when something is omitted and when something is not

Thank you in advance