Sorry I never got to play, I didn't see those messages saying you were ready until way late.
This is why this game desperately needs an invite and notification system. Because Miiverse is not a very effective means of communicating for stuff like this. I'm going to have to set something up in he future so I can organise games with people.
For the first little bit, I probably won't be joining games very often. Not because I'm anti-social, but since I'm focusing on the Grand Prix mode and will be aiming to beat staff ghosts after that, I tend to not catch messages to join and when I'm in the middle of a Grand Prix, I'm completely focusing on finishing it and don't check the HOME menu until afterwards.
I'll join games if I see them, but until I finish all of the single player stuff, I might miss messages when you guys are still online. Feel free to send me a message, but don't feel bad if I don't get back to you on time. It's not me ignoring you intentionally, it's due to there being a lack of a proper invite/notification system telling me about messages, and I desperately hope Nintendo fixes this, both within the game itself and through firmware updates.
In terms of where I am, I only have 6 of the 150cc Mirror cups left, and then I'll be doing Time Trials, which shouldn't take too long. So online will be all I focus on after that. So please just be aware of that.
Also, you can add me to the racers list, NNID is the exact same as my username here.