Feasible?

[quasarvs]

This may have already been asked, but..
Well I'm still rather young in terms of the average workforce age and I'm at a point of just waiting for my diploma and applying for jobs.
It has been really interesting reading about the different kinds of jobs that many have had for part-time or extra work. I already have one of those jobs, and am looking for a part-time position (temporarily) in my field of history.
I am very blessed to have had an interview just this past week at a possible job in my field and it looks very positive.

Anyway, that's some of my story, so my goal right now is just to start making some real money. IF I finally get a good full time position in the future, I was wondering for all you who are more experienced, IS it feasible to study for a teacher's certificate as well as a Master's degree?

My personality is an extrovert who has to learn to be more disciplined. So would it be something that I should even consider for the future? Or would it be more feasible to do one or the other rather than both simultaneously, while working?
What I end up doing ultimately depends on my financial status, BUT if that works out is it feasible?

Thanks for your thoughts!