Go business casual. A shirt, a blazer, proper trousers (not jeans) but not a full blown suit. The blazer may come off as the meeting starts. And if you speak

Go business casual. A shirt, a blazer, proper trousers (not jeans) but not a full blown suit. The blazer may come off as the meeting starts. And if you speak and interact well, there is no chance they'll misunderstand being well dressed for lack of confidence.