The numbers on the schedule are either your current ranking in your league conference (1-8) for league games, and your world ranking for scrimmages (or country ranking for cup games if you're still in it).
as for the training, it is because you haven't played any official games this week. Team training will give traininng to everyone, whereas the other types only apply to those players who got game minutes at the positions.
Since you didn't have a game this week, and it was too late to schedule a scrimmage for today you should do team training. I'd suggest free throw. Training update only happens once per week, and that is tomorrow at about 6AM US Eastern time. Only the setting selected at that point is applied to your players (so switching every day, like I did when I first started), doesn't do anything.
Fire away with any other questions. It can be a bit challenging getting started, but the awesome community here is one of BuzzerBeater's best features.