See “Break the Curse” for more information.
These teams will not have a lot of money like the Cubs do so you will have to be smarter with who you sign and for how much money. Try to sign good players but for not as much money. Usually the players who have an animated face will not cost as much as the players with an actual picture do, so try to sign these players.
I suggest making more than one save slot for each team so that if one turns out bad, you can load an older save. Save often so if you go on a losing streak, you won’t have to redo a lot of games.