Here are some online sources with helpful advise, most of it for Blades in the Dark, but since the game mechanics are the same much of it applies to Fallen Empire just the same:

Official

• https://bladesinthedark.com/sites/default/files/sheets/blades_core_playsheets.pdf
• https://bladesinthedark.com/sites/default/files/blades_playerkit_v8_2.pdf

Unofficial

• https://giantbrain.co.uk/2023/04/06/how-to-play-and-run-blades-in-the-dark/