CAT Preparation

CAT preparation alone will not be enough for XAT as XAT has a section on Decision Making which is very different from anything on CAT question paper. You will need extra preparation for it.

Preparation for Civil Services and CAT examination along with graduation degree is a good statergy but if you fail or score less then min eligibility criteria your all effort will go waste. You are advised to put sufficient attention to your basic degree also.

Its an amazing college. Only if you are ready to study for 12hrs a day, not on weekends.

Yes you can, there are online coaching available so look for classes from Byju's, Mbaguru etc.

You may go for CAT using Career Launcher's study material, and appear its test series too.
it is much good enough.

Career launcher's study material are good enough for CAT preparation and its test series for practice too.

Don't go for coachings they loot you without anything self study is best buy the online and offline materials of course as they are helpful.
Start solving English aptitude
Think about data interpretation
Try and solve them
For Quant I suggest solve the entire 10th syllabus and and don't mug up tricks but try to derive them on your own
Aur haa for logical get arihant and s chand
Stay blessed