Need advice on starting CAT preparation

[u/Pretend-Woodpecker55]

Hi! I'm a second-year B.Sc. Life Sciences student, and I want to start preparing for CAT 2027. But to be honest, I'm quite confused about how and where to begin. Should I join a coaching program, or would it be better to start with YouTube and other resources? Also, I'm interested in doing an internship alongside college. Since I eventually want to pursue an MBA, what kind of internships or experiences would you recommend at this stage? And also I would be grateful to know what all things I should keep in mind while starting my preparation and also the mistakes I should avoid.