help! how do i use these things?

Im a ranger/elementalist but i dont know how to use scrolls, signets, charms or anything like that. Plz help break it down for me.

scrolls: i believe that these are foci. you can equip one in your offhand for an energy boost. you cannot use them with 2-handed weapons like bows, hammers, or staves.

signets: a particular type of skill that has 0 energy cost. they usually have a long recharge for balance purposes. signets are based off the idea that your skills are represented by gems on rings.

charms: there is only 1 charm skill ingame and that is "charm animal". using this skill will allow you to charm a pet and as long as you have the skill equipped, that pet will follow you into battle.