It is fairly straight forward, the only tricky part is the two long coloured nose parts either side.
The first time it is hard to release them,don't force them , slide them, but once they are off and you have a look at the way they slide onto the bike it is not too bad. Make sure you press the center of the push pins fully in before you release them and reset them before you put them back by popping them back up high.
I have done it 4/5 times for various reasons and can change a bulb in 1/2 an hour now.The first time took 1 and a half hours. I greased all the bolts while I was there.
You can find a copy of the service manual here,bottom left.The owners manual covers it ,not sure on the service manual.
https://www.v-strom.co.uk/downloads.htm if you haven't got the owners manual.