Driving to Dubai

[Noob traveller]

Hi All,

I'm new to the forum and looking for some advise, I have had a change in work and have a new job which in Sharjah beginning middle of October. I'm currently thinking of leaving 21 days prior (it's a exact number of days because my friends who will be travelling with me can only get this amount of time off) and driving from Scotland all the way to Sharjah. The journey would be done in a older Mercedes S-class which I have owned for many years and is a well maintained car. I have had a look at routes and don't see that many options. The route I think at the moment that's the safest is as follows:

London, France, Germany, Poland, Belarus, Russia, Azerbajan, Iran and finally a ferry to Sharjah. What do you guys think of this route or is there any changes you would advise?

I was also wondering if anyone has recently done a route like this and what trouble they had along the way. Was there any problems taking a car with British plates through these countries and how did people sort the insurance out?