Inorder to make yourself better for the preparation of GATE 2020. Inorder to make yourself strong in technical side then you can also join the NPTEL courses that will be faar better and for other subject's you can also learn it from GATE online series or from gate books. Go through your concepts thoroughly and you can also download the MADE EASY subjective notes that will be faar better than online notes of gate.
All the best
GATE 2020 College & PSUs Predictor
Know your college admission chances for IITs/NITs & PSUs based on your Rank/Score