@Tim03
Ticket sales are not a good income source until Level 4, when the volume starts to kick in. Make sure you have a full house of supporters at low prices. Upgrade ALL the seats first and the stadium last. This will reduce the waiting time when the stadium is being built and you will have some seats/ income, while awaiting completion.
Cat is right that you also do the booster packs. DO NOT upgrade WHILE boosters/youth are being generated, as you will lose out. These reset to zero during upgrade.

@ Mo
"My league see they are top ! !!"
Always look at things from a different angle....like in the words of Diana Ross Upside Down