See this is a very subjective question as the Data Science industry is booming like anything in the current scenario and in such a case getting into the online program of Indian Institute of Technology Madras in Data Science is a good way for tapping into the huge potential of the current job market.

However it is also true that you won't be getting an Engineering degree and many people would not take an Online degree seriously. The best way is to take admission into a tier 3 college and keep your IITM data science program running along with it.

You can also use our college predictor to see your chances in all the colleges:
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope I have answered your question. All the best!