thats great.. =) the best way to tame a rhino is to leave it alone... they are not like green iguanas or as cubans... and put the cage at head level so you arent looking down on him.. this makes him feel bigger and calms him down.. start by petting him inside the cage while his mouth is full of food.. so he cant bite you.. they are also the happiest while eating..dont look at him when you clean the cage or walk past.. so he doesnt feel targeted by a predator.. this is a instinct they have the first two years.. so your only job is to not freak him out the first two years.. then you will have a stable tame iguana =)
good luck!