Correct, you can land in Canada first and then apply for PR. The letter of support and commitment certificate has a field which mentions if the essential applicant needs a work permit under the SUV program. But you have to mention that to the designated entity before they issue you the letter of support (form IMM 5766), else you won’t be eligible to apply for a work permit.
That number should be taken with a grain of salt. It displayed 12 months just a few weeks ago. That number probably includes the peer-review period which adds a few months to the processing time.