Choosing religious community

Assalaamu alaykom!

I have been thinking about one thing every since I decided to become zaydi. I am living in west, in Finland. There are not zaydis here in my knowledge. Also there are not even many mosques here (not sunni nor shia). Sure there are some. This is what I have been thinking. Since Finland is christian country, after my death I dont want to be buried by christian methods. I would like to join officially in some religious community so that I could have islamic funeral. Now here is where my problem takes place. I have heard that praying behind ithna ashari is not allowed? In Finland there is only one shia community and that is 12ers. Should I join them since zaydis are shias or would it be better to join sunni community? This is really quite important for me since I really do want to have islamic funeral and in here it is only possible by joining some islamic community. It is just quite hard to decide which one is more suitable for zaydi since were kind of walking in the middle of road if you know what I mean.

Thank you so much for your help!