I want to study in Canada or United Kingdom & studied open inter and now studying degree 2nd year B.Com. How should I proceed?

The best field after BSc Biotechnology depends on your interests and aspirations. However, top areas include Pharmaceuticals (drug discovery, QA/QC), Clinical Research ( CRA, data management), Bioinformatics, Agricultural Biotech and Environmental Biotech. Students aiming for specialised roles go for a master's degree like M.Sc, M.Tech or MBA in biotechnology or a similar field or the one that adds value to their resume. 

Along with the essential course completion requirements, your application for the Graduate Visa in UK depends on the following aspects of your course as well:

1. the university or your course provider
2. how long did you study in the UK
3. what kind of a course you studied - bachelor's, master's or any doctoral course

No, studying on a Graduate Visa in UK is generally not possible. Students can do so only if their chosen course is not eligible for a student visa in the UK. If you choose a course that is eligible for a student visa then you can apply for the extension of your UK student visa instead. The courses allowed on a Grdauate visa may include professional, recreational or online courses like short courses or skills development that are not covered by a full Student visa. 

UK's Skilled Worker Visa's fee is not refunded upon its grant and usage. The Skilled Worker Visa in the UK is granted for a minimum of 3 years once you start using it, its fee along with the IHS fee become non-refundable.
However, if you work in healthcare roles, then, you might get an automatic IHS refund for working about 6+ months or if your visa was shorter than applied for. 

Since applicants need to pay for a minimum of three years when applying for a Skilled Worker Visa in the UK, applicants with a job offer with lesser in length than that keep looking for a UK work visa that's valid for only 2 years. 

For that reason, one can apply for a "India Young Professionals Scheme visa". This visa allows Indians from 18 to 30 years old to work in the UK for 2 years. The only conditions for getting this visa include- 

• you must have a minimum saving of £2,530
• you must get selected in the India Young Professionals Scheme ballot