Canada

Doing a part time job there will fetch you 12-13$ per hour. Now, it depends on how much you can work on the basis of your classes schedule and college days.
Worry not, you will make at least 2500-3000$ in a month and you will be able to meet your daily expenses and save a little for your next semester fees.
After your UG in CS, you can easily earn 20-30$ per hour.
Go ahead. All the best.

If you are interested then you must go for it. Canadian government need skilled labors thus it is having great prospects.

There is provision in some banks where you can repay your loan monthly, only after you start working.
You know that you are from a middle class family, so with that mindset you have to stay in Canada. You are mature enough to do a part time job there and meet your expenses and do some savings in spite of asking from you family.
Worry not, you will make a better future there and I personally have never seen anyone being disappointed after landing abroad, especially Canada, so go with firm determination.
About worthiness of EE, just see the job listings on google of Canada, if there are much then good for you else choose something else.

Its better to opt for state universities in Canada, they have a better reputation and also their degrees are valid and accepted globally. You can look for like University of Alberta,
University of British Columbia, York University etc. All the best.

This is the list of top colleges of Canada:
1) Humber College
2) Sheridan College
3) Centennial College
4) Fanshawe College
5) Seneca College
6) George Brown College
7) Conestoga College
8) Langara College
Find the course you desire in these colleges, you will do better in future.
You need 6.5 bands overall with not less than 6 in any module in IELTS. Since you scored 6, it is a matter of concern.

Canada is a great place for engineers and it also provides PR, so don't worry. You will get fruitful result after the successfully completion of MS in electrical engineering.
All the best.

52% is quite low, visa chances are also less. You can try applying but chances are extremely minimal unless you have an extraordinary profile. You can check Australia.

As per better education in mechanical engineering, Germany is the best, but as per PR, Canada is the best place for everyone.

You should opt for Germany as education cost is cheaper in Germany as compared to Canada. You have more job opportunities there particular for mechanical engineering. You need to learn the German language for that. Though Canada is good for Masters but it's more costly as compared to Germany. Canada is preferred for CSE.

Actually, there is no age limit to pursue Masters degree. You just need college admission letter and adequate money to study there and always try to show your keen interest in study that will ease you to get the student VISA.