Why not keep it to yourself?

Well, I feel like I should tell him, because he is honestly a good person, and I think he's good at keeping secrets, but like said, im nervous :(

Yeah, but just keep in mind that this can easily haunt you somewhere down the line

How does he think about Furries nowadays?

Honestly, this is stuff that one should hide from their family, if you think about it

If you want him to know, just casually bring it up. For example, draw a furry and make it obvious around him what you are drawing. If he doesn’t respond or notice, maybe ask him at some point - casually- what he thinks of furries.

If he responds positively (or negatively if u don’t mind?) then tell him that you are one,

He probably won’t mind if he was one at some point but just make sure he supports before you consider telling him. If you are worried about your friends/guardians, etc. finding out maybe don’t tell him until you feel ready to tell anyone else.

Hope this helps, bye!