Is graduate school a possibility?

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After failing out of college many years ago, I have since returned and will be graduating with a BA in political science (with a minor in writing studies). I've managed to get a 3.98 (one A-) with the last 65 or so credits, bringing my CGPA up substantially. Additionally, I've participated in research focused internships and have a wide array of submittable writing samples.

Is applying to graduate school a good plan? Would someone like me simply get filtered out before being considered? I do enjoy research, and my writing is particularly strong. My reasons for going back to school include a career shift, having been in software for close to a decade and generally disliking the field. My tepid idea is to pursue a PhD if my MA experience turns out well. 

I am an older candidate (mid-30s) that has shown a capacity to recover my marks. I have a software background that could come in handy considering the type of research I would like to do (using software to do NLP and network analysis of political social media). 

Looking for feedback, and if the graduate path is ideal. If it makes any difference, I am both a Canadian and American citizen living mostly in the states but planning to apply for graduate MA programs in Canada (UBC and UoT, in particular). I would like to contribute to my field if given the opportunity, just weighing the considerations.