Is preparing for CAT with a job really that hard?

I’m planning to go for job + CAT prep from , and honestly, reading so many posts where people are totally fed up with their jobs is making me anxious. 😞 Please don’t demotivate me🙂 I really want to give my best and manage both. But at the same time, I’m wondering… how will I handle it all? 🥲 Any advice from those who’ve been through this would mean a lot.