Please be careful in
Stickam JAPAN! - 無料のライブコミュニティ スティッカム - Stickam JAPAN!(スティッカム) .
You can find 新規会員登録 to register your account just left side of ログイン.
And you will find live chat room by clicking ライブ一覧.
It would be tough to register yourself because they have no English guidance.
As they once had English site, there can be some guide site in English.