Do I have any potential in the academic field?
since I have to study anyway, why not go for GRE+TOEFL, MS in IT or Computer Science and then a PhD degree from USA

Maybe you're aware of this, but "studying" has little to do with getting a Ph.D. It might suffice for an MS, but a good MS involves more than just "studying" as well. 

In other words, if (as stated) your idea is that instead of "study" to get a promotion, you want to study to get an advanced degree, you're in for some disappointment. A graduate degree (especially a Ph.D) involves a lot more "doing" and independent creative thinking.