It's one thing to have good blocking in an interp, but we don't stop there, do we? No. No, we interp outside of speeches, too. We take very special care to make eye contact with everyone we talk to and don't feel awkward about it. We "act out" conversations we've had with friends, popping between characters and changing focal points. We pay attention to the way other people stand to see if it can be incorporated into a character. And if you're more of the platform/limited prep/debate-y type, you take "talking with your hands" to a whole new level. Admit that you do these things. Well, I do, at least. I hope you do too, because otherwise I'm just weird.
Once you become an interper, there's no going back. You can't read books the same way. You can't watch movies the same way. You can't even speak or stand the same way! YOU CAN'T EVEN BREATHE THE WAY YOU USED TO. Ok, maybe I'm exaggerating.
You're homeschooled, and you do interps. All the time.