I would suggest you to not ruin a perfectly running car, this would be an experiment which will either fail miserably, or cost you more than the price of your car. Buy something cheap like a Khyber, Charade, KE70, anything around 2-3 lakh, fix it up, decide an engine for it, swap everything in it and drive/use it, make it better, reliable, etc. Once you get the hang of what it takes to swap, diagnose, fix and maintain a swapped car, sell it and buy something better, or better yet, dive into your 2018 GLi with a 2ZZ swap.