Hello aspirant

Hope you are doing great there . You are absolutely right  saying that you can not attempt all the questions of every book along with clearing the concepts . Therefore I would recommend you to solve previous year questions first after going through the concepts . Next only for the topics in which you think you need more practice , follow any particular book . For jee mains it is enough to secure a very good rank .

I hope my answer helps

Wish you all the very best !