As someone who plays Dungeons and Dragons regularly, if I were to participate in a D&D roleplaying livestream, would you watch it?
Like if I play the angsty sorcerer, or the frustrated cleric, or the...
I say start with a one-shot instead of a campaign, try to keep it short if possible. A "5 room dungeon" might be a good place to start. I would tune into a live stream for a one-shot, but these can be very boring and slow paced for a spectator.