Netherlands - Iran - Netherlands planning (weather, Ramadan, etc)

[Matr]

Hey everyone! Long time reader here, now approaching the take off of my own long trip from the Netherlands to Iran and back. Since it will be my first trip lasting over a month and covering a lot more distance than I have on bike journeys so far, I'm stuck with a few issues/questions some of you might be a lot more experienced with and I could use some tips on

So the plan is to drive to Iran (mostly the NW part of it), via Central Europe and Turkey, crossing the border from Turkey into Iran, spending a few weeks there and go back via the Caucasus, possibly taking the boat from Georgia to Ukraine next and see some other places in Eastern Europe I still want to visit. At the moment, I'm looking to depart in mid-March and plan to be on the road for some 3 months. The goal is to take it nice and easy and visit plenty of places in Central and Eastern Europe that were still on my list. The bike I'm taking is a DRZ400S, so I am basically restricted to B-roads and will keep the Autobahning to a minimum (but that was the plan anyway).

The main things I'm a bit worried about and would appreciate some advice about are these:

1. Seeing as the Ramadan is rather early this year (May 15 - June 14), I would like to arrive in Iran in late April at the latest, so I can still drive around for a bit until it starts. I have a hard time estimating how long it will take me to get there, however. Has anyone done a similar trip and could you tell me how long it took to get to NW Iran from Western Europe (avoiding motorways and taking plenty of breaks)? That would really help me with my planning.

2. I'm still in doubt what route to take through Central Europe with regards to the weather, considering I'm leaving mid-March (when it can still be rather wet/cold in the Netherlands anyway). According to Google, the shortest way would be through Germany, Austria, Hungary, Serbia and Bulgaria, but I'm not sure if I'm better off taking a (longer) more southern route, via northern Italy and the Balkans if I don't want to spend days in the rain and cold? Are there perhaps some Central Europeans here that can give me some advice in this regard?

Thanks in advance for any tips! If you have any general advice about the planning of my trip or about nice places to visit thats also most welcome