Canada

Unlimited education and employment opportunities are available for Computer Science graduates. Students can take a decision after exploring and studying all the options. Also they can choose a creative field like digital marketing.
Education:
M.Sc. Computer Science
MCA
MBA
Computer Science stream can be divided into Information Technology, Software, Hardware, Web Designing and Web Development including App Development. And opportunities are available in every field. Multinational companies are looking for computer Science graduates for their development projects. Also digital marketing companies need B.Sc. Computer Science graduates for designing marketing campaigns for media management. MBA will be a better choice for those interested in business administration where they can take responsibilities like corporate communication, social media management and PR. A short course in digital marketing could help fulfill the digital media related responsibilities.

Yes, of course, you can apply for Canadian universities. And yes, you can also appear for SAT exam.
SAT Eligibility 2018: Key Features
Although the College Board does not prescribe any particularSAT 2018eligibility criteria, students aged between 17-18 years of age mostly appear for the SAT 2018 test to get admission into colleges for undergraduate studies. Ideally, high school students opt for the SAT examination. Age Limit- SAT eligibility 2018 do not state any age limitation to appear for the SAT test. If a candidate is 12 years old or younger, he/she can register for SAT by mail ONLY. If a candidate is 13 years or older, can create the free College Board account to register for SAT 2018. According to the SAT 2018 eligibility, if a candidate is 21 years or older, then he/she must produce an official government-issued photo ID, like a drivers license or passport, to the test centre. Hope this helps you. Be free to share any problem you have. GOOD LUCK.