Canada

B.Tech in computer science has better scope.

It is either a Diploma or a graduate certificate. Entry requirement for Diploma courses in Canada is 6 bands with not less than 5.5 in any module and class 12th passed.
Entry requirement for graduate certificate in Canada is 6.5 bands with not less than 6 in any module and a 3 years Bachelor degree.

The salary of a computer programmer, data analyst or any other work related to computer lies in range of 20-25$ per hour. Now, let us suppose if you work for 10 hours each day then it turn out to be 200-250$ per day.
If you work up to 25-26 days in a month, it would be 5000 - 6250$ in a month. In INR, you will be earning in between Rs.2,60,000 to Rs.3,25,000 in a month.
Sheridan is among the top colleges of Canada, so don't worry to invest your money at the right place. I am sure you will get better output from it.

As per the last year economic data of Canada government, they need people in civil engineering sector, chemical engineering sector, Oil and gas sector, petroleum sector, renewable energy sector and environmental sector mainly. But, engineers in various sectors are also welcome and also have good prospect.

You have to score 6 bands overall with not less then 5.5 in any module.

Take up something in computers because it's very much in demand there.

University of Saskatchewan
University of Manitoba
Memorial University of Newfoundland
University of Prince Edward Island

Approx fees for 1 year course in Sheridan college lies in the range of 15000-18000 CAD.
For 2 years, it would be 30000-35000 CAD.
In INR it will be 15-20 lacs for 2 years.

Same was the case with me & I also wanted to get in a university in Canada for my Masters but because they ask for 16 years of education, I had to drop my plans and now going for 1 year PG course in Sheridan College to fulfil my 1 year of study and will get into the Masters thereafter.
Although someone told me that there are few universities which accept 15 years of education but you have to check on the internet about the ones.

Although her overall band score is up to to the mark but in individual module she need to score 5.5 each. As she has scored 5 in speaking, I think it would be difficult to get a visa.