These garments are alien to him. He has seen others wear them but he is not comfortable in them yet. They are easy to get wrong, easy to make social mistakes by wearing them wrong.
They are strange, but it is a strangeness he must overcome. It is not the first time he has had to wear the clothes off a culture alien to him, and he will overcome his discomfort.
His home world is a galaxy away, as is the world he was growing to know, and all he knows is so far away.
But he can overcome this. He will overcome this. He has tasks that must be done, there are changes that must be made, and they begin by him getting used to these clothes.
But they are still alien to him.