Start a season using the normal settings. You will be asked if you want an expansion or not. You can make two teams, set their uniforms, their stadium, logo, etc.. If you want to build a team around hitting, unlock the Local ballpark which costs 10,000 power points in the shop area. If you want a team that will be based around pitching and defense use the Panrika ballpark instead. It is also 10,000 power points in shop area.