The quickest way to find one would be in the in-game chat. Try English 1-10, you'll find a home in no time. 

Better yet, you can try looking for a clan on Discord. Try the official game discord, or other content creator servers. Good luck!

The issue  is  due  to  the  clan  leader  or  deputies not  clearing  clan  requeste  so  when  they  max  out  it  will  give  you that  message unfortunately 

Thanks I'll try that

Thanks for the info OpheliaA1!

Or you could simply click on the Section - Clan here on the forum. There are plenty of clans looking for all kind of players. 

Any time