Hi aspirant,

I am sorry to tell you that you will not be eligible to appear in either JEE main for advanced examination due to the current eligibility criteria set up by the conducting authorities. The eligibility criteria says that are candidate can appear for JEE main in three consecutive years starting from the year in which he or she appears for the board examination and for JEE advanced it is limited to two years.

So following that you can write JEE main till year 2023 and advanced till 2022. So if you choose the diploma course you will not be eligible to write those examination. However you can appear for examination simultaneously along with diploma course since you have completed your higher secondary education but if got a seat, you will have to leave diploma in between.

Hope it helps!!