Confusion about sallybus and Q practice

Hello peoples ,mujhe iat and nest ka abhi pata chala hai I am interested in research but iska sallybus kya hai? paper' ke Q kaise aate hai aur kya ye jee mains level ka hota hai iske Q wagera pls help.. aur pyq kaha se dekhu kyunki iat ke pyq bahut kam hai aur test series buy karne ki aukat nahi hai 😔 agar kisi ke paas koi link wagera ya pdf ho to pls share for Q practice( four subjects ke liye)pls 🙏🥲