Ornn is one of the best blind picks in toplane because he can fit in many different compositions and there aren't that many terrible matchups where you can't play the game, and even then it's fine because Ornn mainly relies on XP to function. I personally always pick first and I don't have a problem, but always ask for Braum ban.

I think Ornn is very decent to begin as a toplaner. It teaches you to play the early game correctly by applying lane fundamentals. He's also just a really good champion in general especially this season. He is however one of the hardest tanks to play imo, but it doesn't have the skill floor of a Fiora or Irelia, you can still perform when you're starting out because the value he provides simply by being in the game is quite high.

Yes, Hollow Radiance is quite good against him because it allows you to nuke the wave and kill all of the ghouls. The only bad part are the poor stats and that most of Yorick's damage is physical, but I'd say it's worth it. I'll be sure to add it to the matchups section.

I unfortunately do not have a Youtube channel, however I have recently been thinking of doing some streams on Twitch, i'll link it here in case I start doing so: https://www.twitch.tv/evee06