How can I start preparing for UPSC as a class 11 student humanities

Since you are in the eleventh grade, you have plenty of time to attempt several other UPSC exams that are also held and have age restrictions similar to those for CDS, NDA, AFCAT, or any other. Therefore, one should begin preparing for these defence exams as well because they are eligible to do so based on their age and doing so would serve as practice for the UPSC exam.
This endeavour was made possible by one of the most reputable and well-known coaching organisations, EDEN IAS, which also succeeded in establishing itself as the best coaching institute for IAS in Delhi.

The reason is that they are working on LAKSHYA, a 3-year foundation course for IAS, which is specifically designed to teach all students who have an additional three to four years to prepare, such as those who are in college or who are nearing the end of their 12th-grade exams.

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