Repotting this is just like any other plant really. chose the pot you want and use a good compost mix. I'd add some slow release fertiliser granules too. Gently tease the root ball if it is congested and plant to the same depth and water well. I find they do better with some partial shade. I assume its for outdoors.

Is it a hardy one?

It came with no info tag Stera and the other ones offered for sale had no tags either.

Thank You Very Much SBG

well if in doubt bring it under shelter in the autumn and keep it frost free and it should survive for you. but keep it on the dry side when you do. you are welcome :o)