People are weird.. like just fell from the Moon or something… it is clearly stated: VISIT VISA. Why do you think a Government would issue a VISIT visa to someone who wants to WORK in the country? Any government of any country... Why do you think it is so hard to get a VISIT visa to any western country? because they don't want someone like you to come and to work there ILLEGALY! Why do you think... oh.. leave it.. you don't seem to think at all.. so how are you going to provide a tutoring since you have not much of this grey matter in your mind?... poor students...

yeah, answering your question, “The visa status will affect you” very easy: you will be deported and never be allowed to Qatar again...