Hello,
Im wanting to look into the ambassador part of the game but unsure where to go or which specific foreign nation id like to explore.
Shall I just wonder up to the ambassadors and offer help to any that need it or try and look into a specific nation and (if they dont have help already) offer assistance to the equivalent ambassadors?
Thanks for any help.
Having a read through of the wiki to get a feel of the flavour of each foreign nation is a good start, and any of the Winds of Fortune that are about the nations you like the sound of. Then when you do hunt down an ambassador - which is a good idea, although they can be busy people - you have an idea of what they are talking about and what’s the current hot topic. 
The Imperial Offices tent (assuming it’s on the field still) might be worth enquiring at - in the past they’ve been able to point me to where an ambassador was last headed, and may have a fair idea of which office-holders are looking for extra help. I think it was beside/close to the Anvil Library, near the hub last event.