Diploma

Yes, you can join lateral entry in BCA in Directorate of Distance Education, Madurai Kamaraj University . Check out the detailed eligibility and other details below:
https://www.shiksha.com/it-software/course/b-c-a-lateral-entry-direct-2nd-year-directorate-of-distance-education-madurai-kamaraj-university-287511

Sorry my friend but IIT does't give lateral entry. Also, the Diploma courses are of 3 years which means that you are unable to give the exam of IIT main this year.

You can do your registration right now for booking your seat.

No, Diploma is not necessary to get admission in B.Sc nursing in Canada. Prerequisites Needed to Study Nursing in Canada: To be admitted to either a Diploma or undergraduate degree programme (BN or B.Sc in nursing, students must have completed high school with English, mathematics, biology, and chemistry, with at least a C average. Physics is recommended. For those without the necessary prerequisites, many schools offer a pre-nursing year. Regards.

Hi Chirag,
You can consider a career shift, think of an MBA. You already have work experience and therefore you are eligible. An MBA in HR or General Management is something you can think of being relevant. As for your future you must plan wisely and keep options. You may also do PGDM from SPP colleges in Canada.

You can go for chemistry Diploma.

To have a detailed idea about the openings and the recruiters, please refer to the link: http://www.isst.co.in/.