@canv_1234 First you need to apply for SC. Best thing to do is book appt at BLS Brampton. If close by.
After you received SC with cancelled PP only then you can apply for OCI you cannot do it together.
For SC it is 60 Gillingham Drive walk-in without appt. 8 AM to 1:30 PM line up starts at 6 AM processing time is about 1 week now
Fill App here:
https://portal3.passportindia.gov.in/Online/index.html
For OCI it is 40 Gillingham Drive walk-in without appt. 8 AM to 1:30 PM line up starts at 6 AM processing time is about 45 days now
Fill App here:
https://ociservices.gov.in/
I would suggest you to do a mail-in delivery with Purolator after app processing as BLS is forcing applicants to do so by reducing the Pick up window to 3 PM - 4:15 PM this has resulted in line-ups to receive documents in my opinion not worth the time and effort unless you are free in the afternoons. It is about $ 37 per person for courier delivery after processing
All above timelines are for BLS Brampton not Sure about Toronto or any other location from my personal and friends exp.
For a timeline please refer signature.