Merchandise. When you have more local players that they are playing some role to your team more profit. Arena. Win more=more spectators. Develop a player and sell him. For example i bought a player before 3 seasons for 100k. Now after 3 seasons training worth 3-3.5M.
In general my advice is to read the threat for the newbies, especially on your domestic help forum. I am sure that you will find there everything that you need for your beginning.