Puberty signs?

I feel as if I've been posting way to much in the past week or so, but as a new owner I'm still trying to learn everything that I can.. I have a male chin who is about 7 or 8 months old. I have read that chins usually start hitting puberty around 1 year old and I'm curious if there are any major changes/ signs I should be looking out for, or what I should expect when he hits puberty. Also, if there is anything I can do to make him more comfortable, etc. Thanks !