Does it matter which country I am in to pursue this dive?
The best news about studying Rails is that no matter where you are in the world, you can quite easily improve your Rails. As long as you have access to a laptop, and an internet connection, you will be able to practice your skills, improving every day.

The bottom line, the answer is no: it doesn't matter at all which country you are in. Wherever you are, you can start learning or improve your Rails. Truly, these days if you want to become an expert at Rails and you aren't an expert yet, the only reason is: "YOU ARE LAZY". 

Remember the Break Diver's Creed: No Rules. No Excuses. No Regrets.