Huh, thanks a lot for pointing out!
My problem is that currently I don't have enough players to replace the whole squad and they always go in yellow...
yes, of course, iirc everytime you enter a new league you can hire more players, so you can have more player on the bench
cause all of you are still in the lowest leauge, just play 45' matches the day before the official match, that's important, so your players won't be too much fatigued
improve your keeper, in the beginning I often got a goal from a long shoot, you can train the keeper than keeping him resting during the friendly match, just use another player as keeper, in friendly match the important thing is getting cards, who cares about the score
also just focus on 2 or 3 players to train every week, so you can replace them with the bench during friendly matches, they rest and they will return green for the league match; to go to league 4 I think you just need to have a trained keeper, one trained player between defense and midfield and one trained forward
a good keeper to prevent goals, a good midfield for free kicks and assists and one forward to punish your opponents
so the next year you can focus on other players (but keep training the keeper) and little by little your team will become strong
don't try to pass to N4 league on the first season, training your players (the three ones I mentioned above) then on season 2 aim for the promotion, so you will have more chance the next year to stay on N4 league