There are no physical standards mentioned by UPSC for which an aspirant can't become an IAS officer. So with a elbow broken, its not a serious concern as you are heathy at this moment. As a result, you can obviously become an IAS officer provided you have to qualify the UPSC CSE with good score.

For the UPSC CSE preparation tips consider the link below:

https://competition.careers360.com/articles/how-prepare-for-upsc-ias

I hope this helps. Wish you a great day!