Need help confused about ipcc

I m new to caclub so I m sorry for any mistake Friends help me please I m confused about ipcc that is it necessary to complete both the groups to begin the 3yrs article training or can I begin it when I clear the Ist group and can clear IInd group during the training shall I study by self or join some coaching and can u recommend me one in lucknow one more thing is it better to give both groups together thanks in advance