This is by far the wisest thing one can say. I always laugh at the thought of those who do all humanities, and no maths and science and say that they want to do medicine, engineering and those who don't do chemistry but want to do pharmacy. Or those that want to do accounting, finance, actuary...
This. Actually I think getting a one to one tutor is better than attending a tuition college as you can learn ahead at your own pace and even if you miss a lesson, you can catch up the next time and there is more flexibility.
Or learning from online videos.
My regrets:
1. Time wasting and procrastination
2. Being too complacent, especially with maths.
3. Should have worked harder especially for maths.
4. Should have studied harder in the beginning of the year instead of during trial period.