Can anyone tell me how to change (drain and fill) the transmission fluid in my 10th gen 2018 accord with automatic tranny?

I drained the used tranny fluid yesterday in my 2018 Accord Sport 2.0T. Unbolted the fill plug right above tranny fluid level check bolt and added 4.5 quarts. Tightened the fill plug back on, started car and went through all the gears (twice), then shut the car off. I then unbolted the tranny fluid check bolt to drain off any extra tranny oil, but nothing came out. Did I not add enough fluid, or did I just add the right amount?
I drove last night with no issues, at all on the highway and the neighborhood. I hope I'm not missing a step or wondering if I need to add more fluid just to be on the safe side.