create subdirectories with single wp installation

We are using wordpress, Paid membership pro plugin for membership, Theme My LOGIN plugin for login and signup, so users after signup will be stored in membership table and wp-user table.

I have a website running on data.xyz.com. This website I have created for one specific country. I have just started using wordpress. I am not an expert.

Now I want to create same website for another two countries. I have to do like data.xyz.com/uk and data.xyz.com/us. Well I basically want all pages in new subdirectory with just new country specific database. So design and everything will look very similar on data.xyz.com and data.xyz.com/uk only difference will be different database.

Even I don’t require separate wordpress installation. All my users and plugins are already there. So, after login user can go to any country and purchase data.

I don’t know how I can do it. Should I create folder under my theme directory ? if I do so how can I access my current page templates for another country? Can I create new page templates under the new folder which I have created? I am not sure if wordpress works this way. Basically I don’t have any idea which way I should go.