Hello dear aspirant,

The Bcece exam would be conducted in the 2nd week of September. The actual date is not declared yet.  The last date to fill the registration form is 5th September 2021. Please keep checking their official website for the date of exams.
there are plenty of books available in the market, with the revised syllabus and previous year question paper. You can buy any and start preparing and test yourself by giving the test papers in the books in an honest manner. Most commonly available book is of arihant. And its good too.

All the very best. Please ask if you any doubts