Humanities & Social Sciences

The combination is good. Both, the subjects are viable in the present day aspirations. Both may fetch jobs, or further prospects.

The Master of economics is a postgraduate Master's degree in economics comprising training in economic theory, econometrics or applied economics.
I won't suggest you to pursue it along with M.Tech because both these courses are too tough to be done together. Either do M.Tech or MA.
Below mentioned are the top colleges of pursuing MA are:
1. Indian Statistical Institute - Kolkata / Delhi
2. Delhi School of Economics – Delhi.
3. Indira Gandhi Institute of Development Research – Mumbai.
4. Madras School of Economics – Madras.
5. Gokhale Institute of Politics and Economics – Pune.
6. UPES – Dehradun.

MA in economics will not be difficult for you. You should definitely go for it.
Below mentioned are the top colleges to pursue MA in economics are:
1. Indian Statistical Institute - Kolkata / Delhi.
2. Delhi School of Economics – Delhi.
3. Indira Gandhi Institute of Development Research – Mumbai.
4. Madras School of Economics – Madras.
5. Gokhale Institute of Politics and Economics - Pune
6. UPES – Dehradun.

Generally, any IT related course requires mathematics in Canada, but they do have options of taking a 6 months bridge course if the subject is not studied at under graduation. If your plans are in management, you might apply, so shortlist the course, then universities and look for individual requirements.
All the best.

After completing BA, you can go for civil service examinations like:
1. IAS.
2. IPS.
3. IFS.
4. IRS.
5. Indian Postal Service.
6. Indian Forest Service.
All the best.

No, but don't share it to anyone strictly with your school or college. They will expel you.