You're mistaken that it's a maximum of 12 months. Some applicant have been waiting 16-18 months.
IRCC states they try to complete approx 80% of all applications in 12 months or less. Visa offices and Embassies around the world all work at different speeds and thinking 12 months maximum isn't correct, just a general timeline to follow.
If you're only just doing a medical and if the general timeline applies, you likely have at least 6 months more before any decisions are made. Possibly 8 months. Not all applications are the same. That's the frustrating part of this process. There are no standards, no benchmarks on which to gauge how far along the application is at any point.
The common theme on this site and other groups regarding PR applications is to be patient. You can drive yourself crazy especially at the beginning of the whole thing wondering when the next step is happening.