I would start doing mocks as soon as you can. No reason to wait until the last month. If you are doing Schweser there are 6 exams, then you have the 3 morning sessions from the CFA (more if you google), CFA mocks, etc, etc, etc. There’s enough material out there to cover, so jump right in.
i feel like the first exam book from schweser (3 exams) are enough, in previous years i felt that the 2nd exam book from schweser was not that usefull. on top of that obviously all mocks starting from 2012