which is better?urgent expertise needed

[wooriedme]

im applying for student visa  after a gap of one year in my studies.the gap was due to some medical problems in the family.now i will apply for spetmber session in windsor,canada.during this gap im am planning to either do a course in french or a computer course.
which would benefit me when i apply for visa?
also what can i do to increase my chances of getting the approval? can i be denied due to the gap.?

also,if i re-apply what are the chances that i maybe denied and what should i do in order to eliminate any such possibilities?