Bonding questions!

Hey guys! I recently adopted a ~6 month old male chinchilla from someone who could no longer care for him. The past few days I've been giving him his space and just kinda sitting by the cage and talking to him. Last night however he totally warmed up and was jumping all over my hands and arms. This morning when I opened up the cage, he was hiding from me all over again. Could this just have something to do with it being daytime and him being more active at night? And am I giving him too much space? I try not to reach in and touch him if he seems really scared, but I also want him to get used to me.

Thanks in advance!!