How to Prepare for a CAT While Working Full-Time

I am currently working with 8 months of experience and want to start preparing for the CAT exam for MBA admission. Since I can only dedicate about 2 hours a day on weekdays, and more time on Saturdays and Sundays, I would really appreciate your guidance on how to begin my preparation.

Which subjects or sections should I focus on first?

How can I effectively manage my preparation alongside work?

Could you also recommend some affordable and reliable online coaching platforms to join?