Hi there. To change founders, at least one other member of the clan must be promoted to Admin, if there aren't any already, which you can do in clan Settings. Next to any Admin, you will see a button for "Set as Founder". This will promote them as the clan founder and demote you to Member. Be aware you cannot undo this action. Once you give up founder of a clan to another member, only they will have the ability to promote members.