Do my co-curricular activities and work experience improve my chances?

Different universities have different selection criteria.

The primary consideration is your academic ability and potential, but for some universities, your talents and achievements in other areas are also important, especially if they are related to your chosen course of study (e.g. Medicine).

For thse universities, you can (and should) present these in your application:

Do let us know if you like to have a second opinion on how best to position the achievements you have or activities you have done in respect to the course that you are applying!