I already wrote the two in-game nicks, mine and my friend's one, in the opening post and we are currently work on a Discord channel.
For everyone who wrote here:
We will be online aproximately a couple of hours after the opening, at 21:00 GMT+2, so maybe we won't be able to play precisely from the start, but we can meet in-game tomorrow evening for sure, to found the clan and to start clanning/knowing each others.