Is it easy to get PR once we go to Canada on a student visa? 

The suitability of applying for a study permit to Canada in any particular month depends on factors including your program start date and your home country:

• Program Start Date: If your academic program or course starts in a particular month, it is best to start the application for a visa 4-5 months earlier. If you’re starting later, it's essential to act quickly, as processing times vary.
• Processing Times: Study permit processing times can vary based on your home country and the time of year. Applying as early as possible is generally recommended.

It's advisable to consult with your university/college and review their specific guidelines and deadlines for international students. Additionally, consider consulting with study abroad experts like Edvoy, who can provide free guidance and support to streamline the application process and increase your chances of obtaining a study permit in time for your program start date.