As per as your Date Of Birth, you will be 18 years of old by April 2022, which does not fulfill the required CDS Eligibility Criteria 2022 as per Age Limit which is 19 - 25 years of old( unmarried).
Candidates should be graduates and between the age group of 19 to 25 years. CDS eligiblity criteria 2021 is based on age limit, educational qualification, nationality and more.
The eligiblity for the exam is that a graduation or bachelor degree of engineering is must with Physics and Mathematics compulsory as subjects in 12th grade. There are different sections where there are different age groups are alloted.For example Indian army, it is 19-24, for the Indian Navy, it is 19-24. On a general note it is about 19-24.So,you are not eligible in 2022 but you are eligible in 2023.
Hope it helps!!