Hello dear student,

First of all I would ask you to see what you want to be . Choose one thing. Don't be in dilemma of doing Everything because that won't be helpful. Choose wisely what you want to become. If you want to prepare for IAS  so it's better to choose subjects wisely and focus on the target. While you can prepare for IIT JEE and become an engineer after that . Totally depends on you . Although after doing IIT you can try for IAS too that's not an issue.

I hope this helps

Thank you