From where and how to start GATE exam preparation from 1st year and I am from local engineering college and my branch is CSE??

As you know .you can appear in gate examination in 3rd year of engineering and also in 4th year or after completion of engineering. So if you want to appear in 3rd year you have to select a online class so that you can prepare for all four years of engineering. Because in gate questions will asked from all four years but you have studied only 3 so you should choose online class from unacademy or any other platform like made easy or the gate academy which are famous for preparation for gate examination