Yeah there's three sections
Corporalki, or the Order of the Living and the Dead, are Grisha whose power focuses on the human body. The Order is divided into two primary types: Heartrenders and Healers. In the Second Army, they wear crimson kefta.
Corpsewitches and Tailors are also technically Corporalki,
Etherealki, or the Order of Summoners, are Grisha whose power lies in the manipulation of different natural elements. This Order is divided into Squallers, Inferni and Tidemakers. The order is loosely referred to as Summoners, and Etherealki typically train in pairs; Inferni partner with other Inferni, while Squallers and Tidemakers are usually train together. Alina Starkov and the Darkling, a Sun Summoner and Shadow Summoner respectively, are also technically considered Etherealki.
Materialki, or the Order of Fabrikators, are Grisha whose power focuses on composite materials such as metal, glass, textiles, and chemicals. This Order consists of Durasts and Alkemi; collectively, they are commonly referred to as Fabrikators.