posted about 9 months ago
Dear colleague
I don't know much about your topic, nor the system of PhDs in Russia. I do happen to know that in my country (Italy) PhDs take ages to complete (sometimes even 7-10 years) and in theory, what you are saying is possible. Having spent almost a decade in the UK, I know that a PhD here is very demanding, therefore the question you should ask yourself is:
Have I got time to do two PhDs at the same time?
If you feel that you need a second PhD to help yourself with your first PhD all you have to do is (in my opinion always) open a few more books about the topic of the second PhD.
Your age is not an issue. 27? I wish I were 27 again :)
I think you should talk to your supervisor. Discuss it with him, tell him about your weaknesses. I am sure he will give you some good advice.
BTW: I did a distance learning course during the first year of my PhD and I remember how much I struggled doing both courses at the same time (considering that my English was much worse back then too).