At first he was nervous but managed to explore the car and then take a nap on our laps. When we brought him home I let him roam around and get use to his new home. He spent a lot of time meandering and meowing here and there. I let him know where his food bowl was and litter box. Since then I played with him and gave him a comfy place to sleep.
Glad to have you back sweety! Hope you don't miss your brother too much~